@Corlando465 - great post.
Bo did this to Bea yesterday for the first time in a VERY long time --- it's an excitement issue. I was on the phone and so I didn't see the BEGINNING of the behavior (over excitement) so I didn't stop it before it got to the hump-fest.
It's probably a natural thing for a pack of dogs in the wild or something --- but not in human company in a modern world. Folks frown on that. I'd correct the behavior and direct this energy toward something else. Getting in front of over excitement is the best course of action for the long term.