Species identity disorder?

so I've joked for years about calling my kids 'dogs'.  It started with mis speaking and saying I had to get dog food. Well, apparently my youngest took it to heart. He's developing dog like attributes.

Uhhh see my belly?

Oh yes,  have your attention...

If you please, I would be ever so delighted to have you scratch my belly. It's soft and I'll roll on my back and wiggle adorably. You really can't resist. In fact, if you'd get that back scratcher thing and tickle me all over, I'd make that furgasm noise.

Please?