I recently got a new dog and he is sweet as can be, however he seems fixated on my 12 year old Boxer mix. She is not spayed, and he is neutered. We got Sissy (Boxer) when she was around 2 years old, and sometime before that she had had a litter of puppies...so now her breasts sag. Loki has a near obsession with licking her breasts especially but also her bum, mouth, and eyes. After he is finished with the licking he will try to hump her. Sissy is clearly uncomfortable and she doesn't let him, but you can tell he annoys her and it is annoying to me as well. I want to stop the problem before she snaps because she is about 67lbs...and Loki is 16lbs soaking wet. Should I intervene?
P.S. He never actually mounts her either, he is usually just humping air...not sure whether or not that is important.