I actually shaved my head last week. Using a Bic and some cool Kiss My Face shaving gel.
Okay, so I sorta geeked it by not asking my wife if it would be okay first. The good news is that it grows so fast that after a week it looks like my regular "clipper with the 1/8 guard" cut.
Will I do it again? Sure. It feels great in the summer. I figure I'm collecting 3% more Vitamin D from all the solar energy absorbed by my massive cranium.
3 days ago