Cooper is almost 10 months old now and we have a little Boston Terrier female (she is not spayed yet of course) that's now 12 weeks old. Monday evening he was lying on his side beside her and humping away at her. His little penis was out and everything!

It literally made me sick to my stomach. He's been neutered so he can't do anything to her can he???
I know it's only natural to him but it was gross!