"My hair's getting a bit long, and my fringe keeps getting in my eyes. It can't be that hard to give it a little trim, right?" 5 minutes later "...I'm going out for dinner in just over an hour. How quickly can I get to a hairdressers?"
My ex had long hair and wanted me to cut it, he pulled it over one shoulder and said "Cut it, just cut it here" and I said "no, it will be slanty" (because he had it pulled over to one side). He insisted, I shrugged and did it .