Yeah I hate it whenever people keep on something silly like that...and even if you did screw him, which im not saying you did or did not because it's no one's bizz but your's, but why SHOULD they care (besides mom & dad)?
and mum and dad only need to know that you wore a condom. it gets akward if you go into the details (that you can remember) so dont drink so much, get stoned or pop sum gurners instead. drinking too much makes you a slut, not who you fuck whilst your fucked