Nerd

A nerd is someone who is extremely passionate about a certain subject matter or topic. It can be anything from Pokemon cards to books but this person will devote many hours to this topic and know many random facts that a normal person wouldn't. Contrary to popular belief a nerd is not always someone who wants to be isolated or can't interact with another human because of their social awkwardness. Nerds come in all forms with all different kinds of personalities.

Guy: She's a total nerd; I like it. Maybe she will be as passionate about being in bed with me as she is over science.