That's quite possibly the stupidest thing I have ever heard. Yes, he might not move, but the Joker has everyone's ear. If he can talk, he can cause chaos. If you cut out his tongue, he'll find another way to communicate. You have to take out his brain. Fool.

Yes, she's growing herself a new perfect son for her own comfort. She's no longer cares for me, nor I her. [He cares, he really cares, but he's not telling that to Jason.]