Bobert, you are not alone.
I find the icons used on loo doors terribly confusing. Is it a man in a kilt or a woman in trousers?
Twice, I have found myself coming out of the men's room in T4 at Heathrow thinking how odd the wash basins looked!

Secondly: My grandmother (born 1886) was taken to Europe shortly after marriage (1911) and reported that the men went in one door and the women in another and they all met in the middle!