Why is it that when a person vomits, it causes others to vomit — even when they don't have an illness causing it? Is this something triggered by the brain or is it something that happens by reflex (survival instinct) for someone to vomit since, perhaps, what the first person was eating may affect the second who vomits as well?

I was hoping you could answer a question for me about birth control pills. There is a history of breast cancer in my family (my mother). Is it true that because of this, it is unsafe for me to use birth control pills? A few friends have recently had condoms break during sex, and I am looking for a type of "backup" contraception system.

My girlfriends and I are debating something: Are baths bad for the vagina?

Is there a reason behind spontaneous nipple hard-ons? Lately one of my nipples just stays that way for the majority of the day. It's irritating! Is there a reason behind it?

1) I'm considering getting my tongue pierced. Is there anything I ought to know before I get it done? What should I look for in a piercing place? Does the piercing ever have negative effects — I don't know, tongue paralysis or something? Thanks!

2) If and when I decide to take my tongue ring out, I worry that there will be scarring tissue or an ugly hole in the middle of my tongue. Is this the case?

I've read your info about sagging breasts and whether to wear a bra, etc., but you don't say anything about what one can do after pregnancy after the skin is stretched out. Please tell me surgery is not the only answer!

I live on a college campus and have noticed many people do not wash their hands after going to the bathroom! I was so shocked, I confronted one of my friends. She replied: "If I don't get anything icky on my hands, I just rinse them withOUT soap. If my hands do get 'dirty,' I wash them with soap." Is her handwashing philosophy correct? Does rinsing your hands withOUT soap do any good?

I have looked through your archives but have not found an answer to my question. I was diagnosed and treated for chlamydia about a month and a half ago. Do I need to get rid of any sex toys I have? Is it possible to become reinfected by using a sex toy that you used while you were infected if you wash it before using it? Please help me find the answer to my question. I really need to know ASAP! Thank you in advance.