My puppy did this at 8 weeks of age......
And --- it really doesn't matter whether it's a "sex thing" or not. It is undesirable behavior and you should just stop it every time.
I didn't get my little boy neutered until he was about a year old. Humping never was a favorite past time of his --not a real problem. But, I can say that I never see him doing it now.
As a pup - whenever it did it - I stopped him immediately. Firmly told him, "No NO" -- and found other things for him to do.
Good luck! Carol Jean |