That is halarious and sick all at the same time! I couldn't believe it when I saw the whole!
Yes, they do leave stuff behind...my Teddy has a big stuffed rat thing (a little bigger than himself) and it has become his hump buddy. I try to tell him NO and the other day I tried to save the rat from being violated and when I picked it up it was wet!
I don't see encouraging that behavior. I took Teddy's rat about 3-4 days ago and havn't sen him hump anything since (yet) I would much rather try to discourage it. But that's just me...who wants to watch doggie porn in thier own living room?!
Kim