I think, there is a classy way to handle it. Sexuality is a big part of some people's characters. They use it to get what they want, or they flaunt it, or can't have it, or whatever have you. In my case, I play an underage girl, however, being a teenager means I have to be aware of what she finds attractive, or what her random emotional spikes will be like. It means it could come up, however, there are definite ways to keep it within the confines of the PG-13 rating.
If something happens, it doesn't need to be broadcast, or explicitly detailed. The fact that it happened, alone changes parts of the RP, when done in a correct manner. Things like guilt, or love, or rethinking life choices etc. You don't need to really detail it, to have it be a changing force, you know?