Who is BU? Parent 1 or Parent 2. I will try to present both as factually as I can.
Parent 1: (to DS, 11yo) we need to go get your hair cut. (It's longer than normal, his hair is curly and thick so it gets bushy pretty quickly)
DS: I don't want a haircut. I like it this way.
Parent 1: Ok. But you need to get it done before school starts.
DS: Yeah, ok. I'll probably need it done in a week or two.
Parent 2: (to DS) No. It's too long and looks messy. Go get your hair cut.
DS: I should be able to choose how I want my hair.
Parent 1: (to Parent 2) I agree with DS. It's summer holiday and there's nothing pressing he needs to look smart for. Let it grow for now.
Parent 2: (to Parent 1) There are standards that should be upheld. Why don't we just let him get away with everything? Let's just let him parent himself, he doesn't need us. You're not parenting him, you're an absent parent. You're being neglectful.
Ok, it's probably pretty clear which parent I am but this is what was said, almost verbatim, minus the ensuing argument.