My Bella did that quite a bit as a puppy when we'd go to the vet's or the groomer's. All they would have to do is pet her and speak to her and there she'd go. One of my son's good friends also triggered that response. I thought she had sort of grown out of it, but about six months ago my niece and her hubby came over and when her hubby went to pet her she peed and she was on the sofa at the time!