It sound like Toto wants to play roughly with your brother. Toto has no idea that your brother isn't always in the mood. I think, if you want Toto to stop, you have to tell your brother to stop too.
Look at it this way, if your brother can't handle Toto playing roughly with him when Toto want to play rough, then your brother shouldn't play rough with Toto when he want to. Fair is fair.
Good luck! |