For me... My best playing and my best sexual performances are similar because they come about through a similar mental "zone". That zone is key. In the same way that you could blindly hit notes on a guitar, you could blindly poke at a womans loins. And you all should know the difference between an intricate soulfull solo, and a bunch of random notes, in the same way as you know (or should know) the difference between a random, drunken one nighter and the passionate lovemaking that occurs between you and your soulmate. if you dont know.... you ought to find out.

as for masturbating with your guitar... hmm... sounds promising given the right mood, and maybe some sexy lighting.