I have no solution other than a paper calendar and stick-on gold stars. After an encounter, have him add the star, so you can point out to him how busy he has been all month. I do think that it is part of the unraveling of his tether; a desperate grasp at keeping connected to a spouse. I remember seeing people chasing each other around, giggling, like in a school yard but with adult gestures. This was at an ALZ facility I was visiting for my mother in law decades ago. The social filter has faded or is gone completely. Since reasoning is also on the way out the door, I'm not sure if the golden glimmer on your calendar will convince your husband that he indeed has had many romps, but you can try.