I have a gay friend whose with me now...It definitely weird for
a guy to put make up in guys' toilet.
His explanation: 
when they look more 'woman' they got go girl's toilet, the girl
don't mind.
As for my frd, he recently encountered a toilet mishap 3 days ago,
whereby the cleaner uncle scolded him for using the male toilet. He
scolded, "WHY YOU USE THE MALE TOILET!!?" As for my friend, he was
rather shocked by the response, and just smiled and walked
away.