You could pet Audrey's belly till she starved to death she absolutely thinks it is the best thing in the world. She jumps up beside a person and immediately flips over begging for a belly rub and loves people with long nails lol
Luciano doesn't like belly rubs. Sometimes I try a few rubs when he's sleeping on his back, but once he's awake, no way. Once I am skilled enough to trim his nails on my own, I'll work on belly rubbing. I can't even do more than a few strokes with a brush at this point.
My black cat mr. Meowgi will let me pet his belly often he seems to like it kinda he will start puring and rabbit kicking with no claws out at the same time. He will also sleep on me but never ever ever sit in my lap just sits close enough to touch.
Sonny uses the "roll over onto back...look how cute I am" thing to get more scratchies. Kim goes silly when that happens. She loooves when he does that,and buries her face in his belly. It's the greatest thing to watch happen. That makes me so happy.