He's obsessed.
He jiggles them, stares at them, pushes nipples like buttons, pours water on them in the swimming pool, holds one in both hands and talks at length to the nipple, places hands on them in a proprietorial fashion when we're out and about, sticks his head between them and snorts (honestly!), in the mornings he's on and off them like a wee suckling pig.
He's 22m, btw. The others were never like this, they just drank and left.
Whatever sort of a bloke is he going to be?