Oh my God, I just spent over an hour helping my brother trim the back of his head with a Schick razor because he wanted to *experiment* with shaving his own head. He came out of the bathroom while I was mashing potatoes for dinner with the sides of his head closely trimmed and the back of his head still full with hair.......it was so funny I couldn't look at him without laughing. Anyways, he apparently couldn't see the back of his own head well enough with the mirror so I, as the helpful older sister, was conscripted to help finish off the job. The only time I've ever helped cut somebody's hair I was using an electric hair groomer with attachments, not a battery-operated razor, a comb, and a pair of school scissors, so I'm sure no one can blame me if it's not all completely even or straight. On the other hand, he's a teenage boy and he can just go to the barbers and get his whole head trimmed professionally. I can't wait till the parents see him.