I'm fortunate enough to have a spouse that's geeky about all the same things I am, and blessed that she's also become a rabid World of Warcraft fan. Warlocks, demons and curses are her bread and butter, and pain and suffering music to her ears.
Like any good and nerdy husband I wanted to encourage this kind of behavior, so when she got a laptop a few years back and needed a mouse to go with it I suggested looking at gaming accessories instead of standard, plebian, cheaper peripherals.
What followed was an important lesson I would forget multiple times, despite my best intentions not to.