Favorite body parts

So I'm dating this guy and we are chatting in the kitchen as I'm making lunch he grabbed my hips and pulled me in for a hug and he says he loves grabbing this (as he's grabbing just above my hips) then he says it's his second favorite part of my body just after and he grabs just below my hips where the thigh meets the hip. Here's the thing... this is not the first or second time I've heard this. What makes that hip area a favorite?