I always keep the boys hair shorter during the summer months anyhow, it just feels right to me, not to mention cooler. And I almost always trim their hair myself, scissors and a little comb and my two hands, which might make me slightly more obsessive about the whole department. Maybe I somehow feel like it reflects on me more or that I should keep tighter tabs on the length of their hair since I do it all myself...I dunno. I'm sure there's some interesting psychology there but I don't think I can unravel it all just now.
The point is, although I may have trouble keeping my house neat, I can be a little obsessive, it's just conveniently mind-bending like that.