Why does it bother me so much when my partners ask me not to cut my hair?

I can’t quite articulate why I am so bothered that every man I’ve dated asked me to “not cut my hair” or “grow my hair out.” I’m a woman who loves a chic bob, and has worn my hair that way for the better part of a decade. I’m currently wearing my hair longer due to preference (of this season) and my partner is asking me to not cut my hair… despite voicing early on that I WILL have a bob again- its just a matter of time.

I’m trying to articulate WHY this bothers me so much. It’s not that my partners are controlling, but why do they feel their preference about my body should overwrite mine? Why is this different than some other sacrifice one might make in a relationship?