You know your husband's a geek when...

Shamelessly copy-pasted from my post in the xkcd forums.

*watching TV, and at a random pause (dinner was ready)*
*Smith looks at the paused screenshot, which happens to be itself a screenshot, of one of a character's many computer monitors*
Smith: Ahh, source code!
*Smith inspects the screen carefully*
Smith: This could be the GDK libraries.
Jean: Ahh, at least it's, umm...
Smith: Open source?
*Jean nods*
*Smith considers some more*
Smith: No actually, this is the OpenGL libraries.
*Jean giggles, and runs off to post in the xkcd forums.*

I love my husband.

For reference: Moonlight Season 1 episode 12, about 5 or so minutes in.