billedmeup:
I would stay away from any talk about feeding. Just emphasize how turned on you are by his body and how hot he is. Stroke his belly and work your way down until you are stroking his cock. At first he may pull back when you touch his belly, but once he learns how much you enjoy it, I am pretty sure he will get into it.
I actually do this already, I really do love his body how it is, and I love to show him.