So... RP for me started thanks to my big brother drafting me into his D&D group when I was a wee lass. I played with a bunch of guys who were older than me and I was the annoying little sister, which pretty much sums up my experience til I started DMing. Then I was the little sister DM, then the DM for my own group. My brother was old enough to deal with the crazy evangelical "D&D = Satanism" stuff. All I had to deal with was a sort of lingering fear from some parents. I ran a lot of games for a lot of groups, then tried some larping and cosplay. Now I run tabletop RPGs twice a week and have a closet full of cosplay outfits that I'll never wear again.
When I was younger, I had a tendency to sneak on my brother's computer and browse through the porn he thought he hid. Back then it was mostly jpgs of interracial sex, threesomes, and some weird hentai tentacle images. He left himself logged into AOL way too often, and one time I discovered his female username and erotic chat habit quite by accident. I knew enough to make it sound good, so I chatted using his username and discovered eRP. I loved it. I moved to IRC chat for quick hookups and more random game and forum sites than I can remember for longer stories before briefly trying SecondLife. When I discovered IMVU, I spent too much time with too many weird roleplays there before searching out dedicated eRP sites where I belonged. This is my third eRP site and probably my favorite.