Re: change facial hair per outfit

You literally do, though. If you have fast facial and/or body hair growth, you may shave before social events etc. to feel fresh and presentable, but will still likely wake up stubbly in the morning or do your jog with less than smooth legs. People regardless of gender will specifically remove hair for especially formal events, stage make-up, certain sports etc. while usually remaining more relaxed about body hair.

EDIT: also people who have very styled facial hair will not wear that facial hair heavily styled all day every day. No-one's facial hair naturally creates impressive curves and shapes, you will style them too when you wish to look flashy.