It always annoys me when women remove their heels! They have a choice what to wear, unlike us unless we just go for it, so if they don't like heels why wear them? Another reason for me keeping mine on is trouser length! If I wear heel-length trousers they look silly with flats.
While I'm still in rant mode, I think most women have no clue how to choose heels, let alone walk in them. They get something that doesn't fit properly, they can't walk in heels anyway, and they blame everything but themselves, and have a nice pity party with all the other heelless wonders.