Do I need to use condoms if my boyfriend might have an STI and not know it?

If my partner and I have been monogamous for three years (and I was a virgin before we met) and my partner tested negative for the HIV virus (twice, about two years ago, with a six-month gap between the tests) is it safe for us to use a birth control method other than a condom? That is, are there still any STDs that my partner might have without knowing it, that we should be worried about, even though nothing whatsoever has seemed wrong with either of us for three years and my partner has had several regular annual physicals in that time?


How can I get my girlfriend to swallow?

My girlfriend and I have been dating for a year, and I love her very much. We have a mutually fulfilling sexual relationship, and we communicate well. Recently, I told her of my fantasy of her performing oral sex on me and swallowing my sperm. She said that would be "gross," and has never brought me to climax during oral sex because she does not want me to come in her mouth. I perform oral sex for her, and I enjoy having her sexual fluids on my face and tasting them. We have discussed sexual fantasies before and have pleased each other very much. But she will still not accept my sperm in her mouth, and I feel like she does not want to accept a part of me into her body -- that she does not have the fullest desire to please me. When I first asked her to do it, I expected her to want to pleasure me, to have desire for my penis. Now, I feel like she thinks my body is not desirable. My question is: what must I do or say to make her change her mind, to make her understand how much I wish she'd do this?


What are the effects of recreational nitrous oxide use?

1) I am wondering about the direct effects nitrous oxide has on the brain, and if it is a fallacy that it kills brain cells.

2) What are the health dangers of inhaling nitrous oxide? I have heard people say that it "kills brain cells," but no one seems to know how, to what extent, and what the resulting effects are. Since nitrous oxide is commonly administered as anesthesia, is there a safe way to consume it for recreational use? If the user controls her oxygen intake, do the harmful effects (if any) still occur?


What should I do about friend's escalating drug use?

I have a friend at school who quit smoking last year in January, and went back to it in October. I have no idea why, and he also started doing other drugs, such as smoking blunts, doing ecstasy, and taking steroids. The drug that I am worried about him doing the most is ecstasy, because it's a dangerous drug. Also, he is always talking about doing drugs. How can I help him? I still want him to be my friend. Please help. This is serious.