And he's upset about it and now I feel like such an asshole!

He uses electric clippers to cut his hair and once he gets the bulk of it done I go in and clean it up...anything he missed and the back of his neck. When I went to do it this morning I didn't realize he'd taken the...clip on comb things...off, so when I went to cut off a longer chunk of hair he'd missed on the back of his head I shaved a big path instead. He asked if I could fix it...poor guy's head looked like a yard that a lawnmower had only gone over in one place...no way to undo that So I had to shave the rest off and now he's barely speaking to me.

Do you ever cut your SO's hair? Ever messed up big like me?