Lacey sulked for about 3 seconds after I made her stop humping the neighbors dog today. First time that has happened, but she is in heat. (He is neutered, and was in our yard)
Murphy has randomly started trying to hump Tipper. He'll be standing next to her in the yard and then casually throw one paw over her back (like the yawn and stretch often seen in middle school boys) and start air humping. Then after I yell at him that Tipper is his SISTER he get's this really ashamed look and walks away....lol.