Is reusing water bottles safe?

I started buying bottled water because it seemed to taste better. As an experiment, I tried refilling the empty bottles with tap water and refrigerating them. And I discovered that what I really liked was drinking chilled water out of the bottle. If no one else is using the bottles, how often do I need to wash the bottles out with soap as opposed to just re-filling them?


How can I find support as a gay student in New York?

I'm an undergraduate student from China. And I'm going to the mathematics department with fellowship. I'm really very happy and eager for my future life in Columbia.

I'm now twenty years, but still have no girlfriends. Why? Because I'm a gay student. Sometimes I really feel very sad about that. You see, I'm also an emotional person and I'm eager for love, but I can't. I'd not prefer to make gay friends on Web sites since many of them are lying and I'm afraid to get AIDS. Since I'm very pure, good looking, and excellent in study, some classmates and schoolmates (male) show great affection to me. But I dare not accept it because I'm AFRAID.

Both my parents are professors, but they are very traditional and could not accept that. At the same time, I do not want to hurt them, so I really don't know what to do. I know New York City have a lot of gay students, and it's also such a "free" metropolitan city, so I'm really very glad, but still mixed feeling.

Here I wanna ask you:

(1) Are there a lot of gay students in Columbia University?

(2) Is there any gay club or activity in CU?

(3) What should I do now?

Thanks so much! I've seen your answer to a lot of questions and feel very excellent. Best wishes!


How can I stay safe in a homophobic school?

I'm a teenage gal in a great relationship with another girl who goes to my school. We're both out to our parents and some friends, with okay reactions. The problem is, our school is pretty homophobic, and word is getting out that we're dating. My parents worry we might be physically or verbally assaulted at school. My neighbor, who owns guns, has already asked me about it, and I'm scared for our safety. What can two girls in a homophobic suburban school do? We don't have the same support system some college students do. We don't have a GSA and I don't trust any of the school staff much. Please help!


What is proper gym etiquette?

1) When you are at the gym exercising do you need to wipe down each machine that you use even if you are not sweating?

2) I'm looking for some helpful pointers you might have on the subject of health club etiquette (i.e., don't wear perfume because others will leave workout equipment wearing your perfume). I would appreciate anything you have to offer on the subject.


Am I eating good or bad fats?

I know it's necessary to have a certain amount of fat in your diet, but occasionally I hear about "good fat" and "bad fat." What is the difference? Is that the same as saturated/unsaturated? What foods have "good fat"? Can I tell by looking at the nutrition label on a food product which kind of fat I'm eating?


Why do I pull my hair out as a form of self punishment?

Ever since I was in junior high, I have been pulling out my hair. I can remember not being able to pull my hair into a ponytail because the hair at the nape of my neck wouldn't reach. I still have this awful and shameful habit. I don't see it so much as just a habit, like the way one might bite one's nails, it's more like an obsession. I'll just sit and stare into space and pull clumps of hair out of my head. I remember having seen a program on T.V. which dealt with this habit as a medical problem that is curable with medication. Unlike the men and women represented on this program, I am not stripping myself bald — yet. I tend to consider it a form of self-punishment, perhaps. Just to give you some background information, I have a tendency towards bulimia (cycles of bulimia occur when my depression is at its worst) and am in general not a happy camper. What can you tell me about this?


What can I do if I forget to eat or have a low appetite?

1) For as long as I can remember, I've had a fairly low appetite. I love food — cooking it, eating it, savoring it — but if it's not in front of me, I can easily forget about it. In high school, it wasn't uncommon for me to make it through a whole day without realizing I'd only had half a sandwich and a handful of M&Ms to eat. I'm living on my own and cooking my own meals now, but without predetermined family meal times, I'm struggling with portion control and meal planning. So many resources say that I should just "trust my body" when it comes to my diet, but my body won't tell me what it needs! Some days I feel like I'm packing too much food for lunch; other days, I completely forget about lunch altogether. How can I make sure I don't accidentally become a chronic under eater — or overcompensate and eat too much? When and how much should I be eating?

2) Lots of people worry about overeating. I have the opposite problem. I just don't get hungry. Some days I'll realize it's 10 pm and I haven't eaten anything in 24 hours, but I don't feel any need to have food. (At this point I'll usually make myself eat something).

I maintain a healthy weight, but I'm sure this habit of forgetting to eat isn't good. Do you have any advice for boosting appetite?