Huey has a special raccoon toy that he humps double time until he has to stop and catch his breath! He doesnt do this to any other toy, and even when I throw away the raccoon and replace it, he acts like nothing has changed and goes at it with the replacement. Right now his "raccoon" is an elephant, and in the past it has been a cow a couple of times, but it is always the same squeeker mat toy, just with different heads. This has gone on for years and he was fixed at 6 mos old.
https://www.youtube.com/watch?v=Ei04...e_gdata_player
He plays with other toys, but gets the raccoon out at least a few times a week...