Einstein was of course known for his extreme intelligence, but also for his playful side. (Remember that great photo of him gleefully riding a bike?) With brains, a great sense of humor, (“Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves.”) and that wild man hair, it’s no wonder Einstein remains a popular figure. In fact, we think he’s downright sexy! Here are 15 reasons why Einstein is a sex symbol for geeks and non-geeks alike.