My boyfriend claims he is HIV negative based on the fact that his blood donations have not been rejected. Is this a safe assumption? Is each and every pint of donated blood really tested for HIV and other blood-transmittable diseases? Do they really contact the donor if the blood is rejected because it tested positive for a blood-borne disease?

My best friend has AIDS and he's sexually active. He has unprotected sex with other men with HIV/AIDS. Should he use a condom instead or can does unprotected sex make no difference at all at this stage? Thank you.

First, I'd like to thank you for this service! It's been so informative to read the advice you've given others. I'm a female grad student and have just gotten into a relationship for the first time. I have a few questions regarding oral sex: my boyfriend loves to suck my nipples and I feel great when he's doing it, but after a while, my nipples start to feel tender and actually hurt sometimes... is this normal? He's not rough when he's doing it, so I'm not sure why this happens.

Also, when my boyfriend "goes down" on me, I worry about what he thinks of my smell and taste. He says he likes it, but I can't be sure... is there some way of finding out if my scent is normal? Can he pass any infections (to my vagina) from his saliva? (He has had only 1 one-night stand affair and he used a condom that time).

Also, I masturbate him (I stroke his penis) until he "comes," but I'm afraid of tasting his "come." He hasn't asked me to, but I think he would like it if I did... how can I overcome this inhibition? Are there any risks for me? I appreciate any help/advice... Thanks a lot!

1) Having read a few posts related to the question, "Is masturbation harmful?", most of the answers I've seen seem to suggest that the only possible harm could be psychological, in the sense that masturbation may be a distraction from one's normal routine.

What about the actual PHYSICAL side effects? Some things can not be dismissed as mere "wives' tales"! For example, when I masturbate often, I do notice a darkening under my eyes. I am only 28, but having been at this a while, it does seem as though I can not as easily become erect, or stay erect for as long as I used to. I may not have grown hair on my palms, but I have noticed (and I'm willing to concede that there may be no causal relationship here) that I have become somewhat hairier, in all the wrong places.

Please set the record straight as to what, if any, harmful PHYSICAL side effects may result from masturbation, and why, in the face of my testimonial and no doubt countless others, such symptoms as I have described are dismissed by yourself and your peers as "myths."

2) Does masturbation affect your growth if you are not yet fully grown?

I am 28 years old, and became sexually active two years ago. My husband is the only man I've ever had sex with, and I am his only sexual partner as well. Where does the gene or whatever it is that the HPV vaccine helps guard against come from? Because I'm too old to get the vaccine, are my chances of getting cervical cancer from this particular gene increased then? Thank you for your help.

I'm wondering if washing immediately and throughly after intercourse helps prevent pregnancy.

1) What exactly is chlamydia? How is it transmitted? Can you get it through oral sex (man on woman)? How is it treated (especially in the case of males)?

2) Could you tell me about the symptoms of chlamydia and if one test is enough to detect that disease? Thank you.

I was just wondering about the difference in effectiveness between "ultra sensitive" and regular condoms. I imagine there is a greater chance of breakage with thin condoms, right? Sorry if this is a silly question, but for some reason, I thought I heard that there wasn't a significant difference.

I have talked to my doctor, to my local Planned Parenthood, and to the local health department. I have gotten the same story from all of them, that unless there are symptoms or a reason, one shouldn't have STD lab work done (or that there wasn't a 'routine' inclusive screen). It wasn't until recently that I discovered that a lot of STDs are asymptomatic. Are there 'routine' tests that should be performed for each of us (besides my normal annual)? If so, where can one go for this kind of testing and what should be tested for?

Recently my girlfriend and I purchased a home pregnancy test and it came out positive. Four days later, we were sitting in a clinic awaiting her name to be called for an abortion. My girlfriend wouldn't hear of any idea but going through the process as quickly as possible.

Throughout the entire experience I tried to be as supportive as possible, taking as much care of her and giving her as much love as I could, and in the meantime suppressing as much of the stress I was under as I could; she has even told me that I was 'perfect' throughout the whole thing. The period following the procedure, though, has been a roller coaster ride: she was subject to mood swings, going from a state of total bliss in my company to practically despising my existence.

She told me she wants time away from me. She is convinced that an experience like this (an abortion) irrevocably changes a relationship. She is pro-choice, but this abortion has affected her more than she expected; she cannot shake the feeling that she killed our child — she has even dreamed about the would-be baby...

Now, I understand that an abortion can bring a person to her emotional knees, regardless of how she might have thought about it previously. But here I am witnessing her shutting me completely out... and I ask myself, is this how it has to be? I love her very, very much — she absolutely means the world to me. She has repeatedly let me know she feels the same about me. How do people deal with this crisis? Is this common? What are the resources available for CU students, post-abortion? How do I convince her that this doesn't have to be the undoing of our relationship, or am I wrong in believing this fate can be avoided?

My boyfriend recently told me that he rarely has orgasms when he ejaculates. I was aware that men could have orgasms without ejaculation, but I didn't think it worked the other way around. Are men more complicated than I thought?

Okay, a question has been asked amongst my friends, and no one seems to know the answer: What is the physiological purpose of the hymen?

I have encountered a problem I never expected; my boyfriend is quite simply very large. I am unable to perform oral sex except for the first couple of inches due to the girth, and vaginal sex is not totally satisfying for him because he is too long and cannot fully penetrate without causing me significant pain. I've seen my doctor, and am reassured that there is physically nothing wrong with me — no infections or scarring, but am finding it difficult to come up with a solution. Any suggestions?

1) While I found a lot of info on oral sex and AIDS on this blissfully honest site, there didn't seem to be any info on "fingering" (not sure of the technical term?) a woman. I'm in a high risk AIDS country and recently "used my fingers" for a couple of minutes to delight a local woman who has turned out to be having her period. After noticing a considerable amount of bloody discharge, we stopped. But do I have a considerable AIDS risk? There were no cuts on the fingers I used but a small, possibly healed, cut on the thumb of the same hand. Break it down for me. I'm a bit on edge.

2) Can you contract HIV from anal fingering your partner if you had cuts/scratches on your fingers?

I have been thinking about getting tested for STIs for a while now but have been concerned with medical privacy policy. From the research I have done, I have not been able to find if I tested positive for an STI would I be referred to in name as a 'risk to public safety' or simply as a statistic. I know that this will be placed in my medical records and documented for the rest of my life. Will I have a label attached to my name for the rest of my life? Who will be notified if I do test positive for something like syphilis or herpes?

Some of the girls at my school talk about how their boyfriends got to first, second, or third base with them. I feel kind of left out because I don't know exactly what they are. Could you tell me what the bases are for girls and guys? I'd really appreciate it.

I'm a thirty-something man who has a happy but often stressful life. I'd like to get a massage every now and then, but I'm worried about what might happen when I'm virtually naked and being rubbed all over by another person. In other words, I'm worried about getting an erection during a massage. It seems like there would be no way to hide it.

How do I deal with this? How do masseuses deal with this when it happens? Do they expect their male clients to get aroused? Would they think I'm perverted when I'm lying on the table and standing at attention?

I once read an article stating the soy products (espcially soy milk) can lead to impotence within males if taken to a high degree. I go through random bouts in my life where I cut out cow milk completely and drink just soy milk for long periods of time (not because I'm lactose intolerant but for argued health benefits). I'm just wondering whether drinking strictly soy milk every day (at least 3 10-oz. glasses for me) is overkill.

Just wondering if Vaseline is an okay form of lubrication... I notice that the container says, "for external use only," but I am wondering if this includes vaginas! Thanks. You're hilarious.