Well don't really do that, but check out this video. I'm not exactly sure what's going on, but it looks like this guy is playing with this fish, and the fish is enjoying it!

It never crossed my mind to pet my fish. Ya know? A pet fish is typically a 'look but don't touch kind' of pet. The odd part about this is how much this fish seems to enjoy it. Even after the guy flips the fish out of the water, it comes back to him. Weird!

By the way, comment award goes to the guy who commented this on the original Youtube video:

'He's going to rub the fish's mucus layer off, and then the fish is going to get sick and die.  Don't pet your fish!'

It's not everyday you hear a warning like that!