I never would have thought that so many different things turned so many different people on, but what turns me on the most is (this might sound strange) those hot couples walking around. I can only imagine what they get to do to each other, and at the thought of it, I get turned on. Another major turn-on for me is dirty fanfiction. I use it mainly to get off when I need to, though, considering that my girlfriend isn't very good at satisfying me.