i'm 19..i waited until i just turned 17, and about3-4 months w/my first real boyfriend....he knew I was "on the V team" and didn't pressure me, made me feel special and waited until one night when i was ready...it was a great experience..and I haven't ever forgotten about it....I'm still with him now (almost 2 1/2 yrs)
i do think that while you're in a committed relationshp, sex brings you closer, and shows how intimate and emotional etc. the other person can be...just my own opinion, but there is "that whole other part" of being in a relationship (before marriage etc. as well) and I think it would be a shame to not see "that other side" of your bf or gf if you waited until after marriage

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Xs and Os,
Kristin