I'm really sorry that happened and your little boy must've been in a lot of pain.
I'm glad that it wasn't worse.
Like others have said, though, this is NOT a good representation of yorkies. Tucker has *never* humped anyone EVER - and neither have the other 2 yorkies I've had. None of them have ever bitten anyone either. This yorkie is obviously poorly trained. Please don't blame the entire breed for something *one* yorkie did.