Merton liked being petted. But that wasn't distracting enough for him not to test the ticklish spot once it was found. He beamed a wide grin, grunting as he was squirmed against. "You're either going to turn me on make it so I can't get turned on for a long time if you keep squirming like that." Since he'd get a knee to the groin soon if Heath wasn't careful, and that put you out of the mood pretty fast.
He still tickled though, testing the ribs, and then slipping fingers lower to try for the spot on Heath's hip. Which meant he had to try to fit his fingers under the waist of his jeans, but that didn't bother him.