Bass guitar is damn sexy, no two ways about it! People who play bass are just naturally sexy. Like.... Mikey Way Alicia Simmons Lindsey Way Pete Wentz Jeph Howard Ashley Purdy
I've dated a trombone player, clarinetist, percussionist, and saxophone player, but I would have to say, guitar, drum set (preferably jazz), or piano, I think are the sexiest.
Sometimes it's violin. The way those girls can get when they're getting crazy on a string instrument . . .
But sometimes it's piano because there is something so sexual about the way the fingers just slam down on the keys and dance around and if it's someone on stage, sometimes there's sweat . . .
Bass + Electric Guitars. I pick bass, because I play it and love the sound it makes, plus not many people notice it. I pick guitar because you can really jam out, and people are just hands down epic in solos.
Guitar. You know, just because I play and I'm obsessive over the instrument Piano is amazing as well. It's probably the most beautiful instrument in my opinion, besides the harp.