If you are looking for pure then you have go for "Hentai Games" they are good in making that kind of games, and if you are not, and looking for.
Its adult only so you can imagine all the things you can do! just do a goodle search for "adult games", youll get a ton of flash based game sites.
http://www.funny-games.biz/adult.html. Took me ages to find. I used to go on there when i was a perverted kid. Theres absolutly tons on there.