Mira was wondering why I think it's good to be nerdy, and here's why... some jokes that require nerdyness to understand..
Joke # 1 comes from vector calculus
Q: How is a PhD student in Theology like the Laplacian operator? A: div grad (of course this refers to a graduate student of divinity, as well as del^2.)

Joke # 2, actually comes from one of my lecture today, I'm proud to say i made it up..
what do u call a gay scientist? Homo-genius.
We were studying homogeneous solutions, and as usual I wasn't listening...

and last but not least joke #3 comes from geometry:
You hear the one about the geometer who went to the beach to catch some rays and came back a tangent?