I don't know if it would be dangerous, but somehow I don't think it would be good for him either. Check the ingredients on the lotion - probably a bunch of chemicals which can't be good for any living thing to ingest. Rubbing on the body is a whole lot different than being in the body.

And I would think that if he really, really enjoys it (which seems to be the case), and it hasn't seemed to cause him any harm yet, and as long as you don't let him ingest too much of it, what's the harm?

Oh, and Welcome to Pet Talk! What's your kitty's name and if you stick around for any length of time, you'll understand this - pictures, pictures, pictures.