I Have a Question

No

I dunno about phrased that way, I think it's totally fair to suggest/mention 'hey, I really like your hair when it's done this way'.

Yes and no. I’d not ask him flat out to do it. BUT, I’m not above hint dropping saying “your hair would look super hot if you cut it this way...”. ;)

Nope perfectly fine. Good partners bring out the best in each other and push boundaries for constant improvements.

yes. it's only hair. if he doesnt like it, itll grow back and he can change it.

Since I´m bald, I have no personal experience as basis for giving advice about. 😁

Yes.

No

You can express the opinion. And he can refuse, because it’s [b]his[/b] hair.