Actually, even accordions couldn't hurt. The list tends to be largely nudity-related. Whether you're coming back from the gym or working your athleisure post-grocery run, it's the double whammy of looking fit and sexy that really woos dudes. And pretty much any instrument counts, except for maybe the accordion. Not so random: Naked people, pictures of naked people, moving images of naked people, being naked, being touched by a naked person, and being touched while naked are all on that list of things that can affect his, uh, privates. There are few things sexier than a woman walking into a room and just dominating it. Studies show that it's the color most closely associated with arousal. It's really a "misattribution of arousal. Being passionate about something—anything—is just sexy.