I've had a lot of sex to be honest - young, old, in-between - lots of sex.  The first time I ever truly allowed myself to be a girl and have sex was back in my college days.  I'd been chatting with a boy for a few months and he was well aware of my sexuality - just never been passable enough to follow through.

One night I had him over and he was hard as a rock!  We fucked in every room of my apartment until I finally jacked his load all over me on the living room floor.

 Anti-climactic perhaps, but now I'm horny and I'm going to go find a guy to fuck!