I mean, I've groomed some of my partners, some of them have groomed me.

So... yes?

There is at least one person?

Maybe I am very strange, I am autistic, so social norms are basically all arbitrary performances to me, but it seems to just make sense?

I'm fairly sure this is also a behavior that is done by a good deal of our ape ancenstors, mammals more broadly: Grooming and cleaning another is itself a kind of social bond, a way to establish and demonstrate trust and care.

It also just saves money; if you have or can teach a partner how to do things like... haircut touchups, eyebrow shaping, basic mani/pedicure type stuff, whatever, now you don't need to spend money on something you'd normally have to pay someone else to do.

And you can just like, have a conversation while doing this. Quality time, lol!

Works super duper well if one of your 'love languages' is just any kind of caring/affirmatory physical touch.