When I was a teen, it used to happen all the time, and it was so embarrassing. I was scared to wear boxers for years because I was afraid someone would notice my raging boner. It still happens ocasionally, but not as much as it used to.
I am guessing that your boyfriend is pretty young. Just realize that it is a natural reaction, and your boyfriend can't control it. Just take it as a compliment, and be glad that your boyfriend is sexually aroused by you.
<p>[This message has been edited by college_dude (edited 04-15-2001).]
Anytime I'm with someone new for at least the first few times I'm always sporting allot of chub when we start kissing or getting otherwise frisky, and I'm 26.
Recently, with my latest GF, I am so sexually attracted to her it just takes a few steamy kisses to get me stiff. Drives her wild, I swear she does little things on purpose to get me hard when we are out. (Loves to stick her hand down the back of my pants or rub her *** against my crotch when we are standing together.)