Wild guess. Chicks dig Unicorns no matter what age they are, while Fauns & Satyrs usually have to get females drunk before they can "hook-up"! No contest ;)
May be on to something there bro, there's the whole virgins falling at his feet thing I mean 4 so far for sure. Plus not only are unicorns cool as fuck, but they're mythos is almost entirely sexual. And let's face it he's not going to be a bunny is he? it's going to be something mythical, and the Unicorn is the best fit.