Is OTHER wrong in the post ? POST : At work there is a male and female toilet. Obviously I only use the male toilet but the females only use the male toilet aswell. 

Almost every single day when I want to relieve myself I have the girls in the male toilet doing there make-up when no one is in the female. After about two months of this constantly I've just had enough, yesterday telling them it was bad form. 

Today they have gone to HR saying that it's me who's discriminating them. AITA for telling them to stop using the male toilet.