Here's a little conversation I overheard the other day between my 5-year-old son D- and my 2-year-old daughter M-, while they were sitting on the floor getting dressed:
D- (innocently): You look handsome today, M-.
M- (lovingly but firmly correcting him): No. I'm pretty! Not handsome.
D- (seeing a chance to frustrate her): I'm pretty, you're handsome.
M- (getting riled up, but still just extremely insistent): Noooo!!! Handsome is for boys, pretty is for girls, so I'm pretty, and you are handsome.
D- (scrambling for a BS explanation, just like his old man would): No. ...
M- (shouting now): YES!! Handsome is for boys and you will be in trouble for saying a girl is handsome!
You may enjoy my previous D- conversations, (2YO daughter) M- conversations, and (wife) J- conversations.