So I had my Salvator out letting him get some exercise and he started everting his privates every couple minutes. Jacking his hind end up and showing his stuff! He has never done this in the past so just curious as to why now? Almost acting like he was walking and marking his territory or something. Maybe just getting the urge for a lady friend? He's about a year and a half old and 4 feet long. Any ideas on this behavior?