Anyone who stereotypes women - had so much of it in my life, from older generation - “you should take care of your husband, it’s your job as a woman” or “you can’t play with that, it’s a boys toy” or “get a nice hobby for a girl, you could cook or sew or do home decorating”
once again retail related... I hate it when customers come in buying something for their child/grandchild and we don't have the "correct" colour.
I once had a woman tell me she didn't want to buy the blue baby bath because "it's a girl" I was stood there thinking 'who is seeing the kid in the bath?!'
The other one is when I offer a colour and they literally just reply with "well it's for girl/boy". It's the one time customer service goes completely out of the window for me. I will literally stand there and just repeat "which colour would you like?" until they pick a colour.