When a young male pup humps it has nothing to do with sex. It a means of asserting dominance. The pup realizes that the golden is submissive and is just reinforcing his dominance.
I would pin the pup on the ground and hold him there until he submits (relaxes). This would reinforce my position as the Alpha and the pup would be less likely to try to assert his.
I would pin the pup on the ground and hold him there until he submits (relaxes). This would reinforce my position as the Alpha and the pup would be less likely to try to assert his.