Well you can get away with anything but they will notice.
During my teaching time (in the eighties) I got:
from the kids
You don't have much beard shadow
Nice tanga briefs sir (I was bent over and my trousers must have been thinner than I thought)
Your skin is very soft
from the Teachers
Do you pluck your eyebrows?
from anothr:
You pluck your eyebrows, manicure long nails, long hair, dye your hair, style your hair, Do you dress in womens clothes at night?
We are going to call you monsieur le bouf (for my bouffant hairdo)
I still thought I'd pretty much got away with it but when I went to leave the school, they held an assembly, as was the practice, to say goodbye.
I got cajoled into having rollers put in my hair (I protested but secretly thinking, yes please) and then pulled in front of all the kids. The head said Mr ---- is leaving but we've managed to find a suitable replacement. Then one of the fourteen year old girls walked into the hall wearing my jacket. She did actually look like me. It still cracks me up when I think about it, I was in stitches at the time.
Guess I hadn't got away with it, people probably had avoided me but I can't say it mattered or that I cared.
Least I didn't do what a TV friend did. He was a dentist and during lunch he realised he'd conducted his morning surgery with a suspender belt strap hanging out of his trousers.
