why is he acting like this?

[Hillsvale]

Sounds like you should clip his beard . Maybe you should get some interesting things to play with .. What is humping ????

Ummm.... ever seen a male dog show dominance by "mounting" another dog, person, teddy bear... this would be humping... Oh my that word! , not entirely sure that shaving the poor guys beard is going to stem the activity. (yes I do get that you probably meant removing a urine catching device) ...

My I am tired!

Luv.... I think you need a vet to pay a visit and feel up your wether.... sort of sounds like he isn't and for some reason decided now was rutting season.

 

[currycomb]

sounds like a hormone imbalance of some kind. at his age, maybe a tumor on an adrenal gland. you might call your vet if you have one, and just run it by him or her. might be a test they could run to put your mind at ease, or maybe even treat.

 

[luvduds]

That is kind of what i was thinking. Too many changes for it to just be in his head.