Fixes the mouth washing message

Fixes the mouth washing message and the cleaning message appearing at the same time. Fixes #5775

Lets monkeys wash a human's mouth.
@Miauw62 , I can't easily replace the ishuman with something to allow more mobs to be mouthwashed b/c we need to exclude slimes, silicons and some simple animals like maintenance drones and festive trees, unless there's a has_mouth var that I don't know about...