I've only had male Yorkies. My 8 yr old was neutered at 6 months and has never lifted his leg or marked. He only humps the throw pillows on the couch but only when he's really excited and playful and it is very brief. My little guy is still a baby at 12 weeks and will be neutered as soon as the vet says it's ok to. In my experience, I have seen more females humping than males. |