When we are alone, we touch, caress, and fondle each other most of the time. Now and then, several times a day, fondling goes a step or two farther. But when we are with others, we often quietly resort to something ethologists would quickly identify as grooming. While we are sitting with friends in a café or at someone’s home, I turn my back to her and recline on her chest, and she plays with my hair. Sometimes she reclines on my chest, and I play with her hair, but that happens less often. Realizing that we must be a bit funny to our company, she has started fooling around with grooming as an explicit metaphor: she behaves as though she is looking for something in my hair, and then popping in her mouth whatever she finds there. Our friends piss themselves with laughter at the sight of our oblivious grooming.