I cut my dh's hair, and once, I was talking away, not paying attention, and then next thing I know, I zipped right up the side of his head with a zero. He wasn't amused either...for a guy, he cares a lot about his hair. He had to have someone fix it for him...which basically, meant a buzz cut. He usually wears it shorter on the sides and back (with long sideburns) and then he wears it a little longer and textured on top, so he can "mess it up" with styling goop (seriously, I don't even use hair spray, and my dh uses some kind of pomade junk!).
I wasn't knitting yet, so he had to walk around with his poor pink scalp showing. :oops:
Tell your son he is very brave and that not even a bad hair cut can make him look any less handsome! Poor kid!