How do birth control pills work?

I've just had my first condom break ever. I'm on the pill, so I'm not worried about pregnancy, but a couple of days afterwards I had yeast infection-like symptoms — no unusual discharge, just itching. If I pick up some over-the-counter yeast infection medication and the symptoms go away, would I be safe to assume that was the problem? Or should I definitely go in for an STI check?

I've been on birth control pills for eight years and I'm thinking about trying a few months off them. They were prescribed when I was pretty young because of very irregular periods. I also was involved in a monogamous relationship for a number of years, so they were convenient. Now I have no steady partner, and am really curious to see how I feel without taking these pills. Would it be ok to go off them at the end of my pill pack or should I consult someone at health services first? If I go off for a few months and my periods are as horrendous as they were when I was younger, would it be safe to start up again on my own (I usually just see someone once per year for pill checks)?

When my girlfriend and I have sex, we almost always (nine times out of ten) orgasm within a few seconds of each other. Honest! This has been happening daily, with the exception of her periods, for about six months. We are both quite satisfied with each other as sexual partners. Are we an unusual couple? Thank you for your time.

I care for my girlfriend, whom I have been seeing for a few months now. I have no problem maintaining an erection when she performs oral sex on me. In fact I can climax twice in a relatively short time. We have, however, been unable to actually engage in intercourse, since when we go to put on the condom, I lose my erection. I'm not really having too much of a problem getting erect (i.e., I get an erection, and may lose it early on, but I am able to get and maintain another one for oral sex). What could be the problem? Stress? A lack of physical attraction? I will be grateful for any answer you can provide me.

I see that in several messages and answers, that reference is made to oral sex accompanied by the use of ice cubes. I'm pretty ignorant about this and would be very grateful to you if you would tell me more about this. My boyfriend and I have a very good sex life and we enjoy making love, but we're also on the look-out for new things to try. I've asked my friends about this and some of them thought it was a joke! Thanks for the help.

My boyfriend has had pain during urination and ejaculation. We have been only with each other for the past year and neither of us have STIs. The info I have found on the internet makes me believe maybe he has urethritis. My question is, can you cause damage to the urethra during oral sex? I don't want to get too personal, so I will leave it alone, but I want to know, can you cause damage due to any force to the urethral opening?