Rant: A guy in my chair yesterday said he trims his own beard with kitchen scissors.
I used to just nod and keep cutting, but now I show them a quick line-up with my Wahl detailer to prove the difference. Anyone else get tired of hearing about home haircut fails?
Show them the hair they just cut off, like a trophy from a bad decision. It makes the damage real and harder to argue with. Sometimes you gotta let the proof do the talking.