My avatar's source is a lot more innocent than you're all thinking.
This cartoony square of hilarity came from the hit series Speed Racer. The original cartoon where everytime Speed has to swerve he sounds like his legs are being cut off. This guy was hiding in the background as one of the spectators. I laughed so hard when I saw his face I ended up looking like he did. Snapped a pic with my phone and he's been my avatar ever since.