Kodi has recently developed a new embarassing problem. When we're training certain tricks he gets overly excited and begins thrusting. At first I was so shocked that I squealed "nooo...." and ended the training session. Ever since the first time he did this I have been simply ignoring the behavior and carrying on our training session as normal, as if nothing's happening, thinking that eventually it would go away on its own. It has been a month and a half now and it's only getting worse. I'm confused because he is neutered and I didn't know that neutered dogs did this. It isn't because he is, umm, interested in any female dogs or anything like that. He's simply getting overly excited and expressing it this way. But he only does it when we're working on certain tricks or when I aske him do a trick he already knows like the backstall, hug (where he hugs a tree with his front paw), say his prayers, etc. I just don't get it.... I really want to teach him the backstall but for now I've put this trick on hold because he just won't focus, he only thrusts. I'm at a loss as what to do. Any suggestions? I would really love to be able to put an end to this behavior for good.