I prefer creating full games with active stories, were sexuality is simply an integrated part of an ongoing epic. I primarily approach games as a gm with the goal of creating truly fun stories for my players.
The amount of sex in my stories depends mostly upon player preference, regarding my limits I'm down to put anything in my stories except anything regarding underage characters or bestiality.
I tend towards fantasy settings but am good with any setting. Want to play an intricate game of thrones like epic with wild sex or slavery or scat blowjobs or something? I can accommodate quite easily.