A man goes to visit his mate's newborn son, the Dad says "baby was born with no ears so please don't mention them or my missus will get upset". Bloke sees baby and says ah, he's got such cute feet, chubby cheeks and gorgeous eyes. By the way how's his eyesight? Mum says oh his eyesight's perfect, bloke says "Great, cos if he needed glasses he'd be in trouble !
British (sort of ) joke