A thread I just read reminded me of an incident a couple of weeks ago.
I was on a really long flight and was waiting for my connection flight. The first flight had been overnight and I hadn't slept.
Was sat in departures, extremely bored and looking like a hot mess and decided to retouch my make-up. It wasn't busy and still a few people were staring at me.
A few people on the thread said that doing your make-up in public is rude and anti-social. I really just don't get how it's rude, it's just make-up which doesn't have a smell to it and as for anti-social - I wasn't planning on making conversation with the strangers sat opposite me.
I agree that in a certain situation such as in the middle of a job interview then yes it's rude.
But overall I really don't see the problem.