What turns you on?

Whenever I watch porn, reading confession here I cant help but to think what turns me on, what turns other people on. Are you into the storyline of the sex? or the dialogue when they are having sex? Are you into the position they are having sex? Are you into the chemistry of the 2 lovers? If you close your eyes, do you still get turned by the porn? For me, Im aroused by the sound, the clapping sound you make when you fuck hard and hit the pelvic. The pace, the louder the sound indicate the amount of lust in the fucking action. I love it especially 2 lovers fuck quietly without much nonsense moaning and dirty talk, just clapping and panting.