I think "Good girl gone bad" have similar mechanics... You will get more fame and money for being for slutty... And it has good story too...
Descent and Katie's corruption also has similar stuff If I remember correctly.
Karryn's Prison - apparently staying sex-free is playing the game in hard mode (in the later levels) and the best build is one that outlasts everyone in sex. Also the bar job pays a lot better if you're willing to go above and beyond.
On Edge - milking men for their cum is required to prevent a Game Over and make progress. That's not necessarily slutty, given the weird plot, but you are rewarded with more cum if you get them horny before milking them.