Kutner's bad habit

Took this video last night before I sent them to bed. Kutner's latest thing is to nurse on Wilson or Chase when they are trying to sleep. At times he does it so hard they squeal and jump away from him, I'm assuming its from being taken away from their mom so early and hopefully he grows out of it. So I get to be on watch for any sores he might be giving them from sucking on the poor guys. Even if Kutner doesn't grow out of it, it wouldn't be a horrible thing. There are plenty of adult cats who suck on things for comfort, like how a child will often carry around a blanket or stuffed toy. He just needs to figure out to not do it so hard and that not everybody will react so nicely to being suckled on.