She can also assume that he likes it because she'll feel his flesh start to firm up.

And she doesn't have to repeat her invitation twice.

Moving with the languidness of a cat, he joins her on the bed, lounging half on the mattress, half on top of her. He rests his weight on his elbow and hip, his body turned just so to leave enough room for her to keep her hand where it is, as he dips his head to plant kisses down the side of her neck to the pit of her throat.