Ok so with the help of google I know what my dogs doing when he's doing the chattery thing. Taking in more scent and shoving into the johnston (?) Gland in his mouth so he cant taste/smell more of what he's smelling. So thats cleared that weird behaviour up.
Now, the reason hes doing it is because my mums dogs here for a stay and my dog wont leave her alone. Sniffs his willy and rear end CONSTANTLY following him round and occasionally trying to mount him. Usually I'd leave them to it but its getting right up my nose (and my mums dogs' last nerve) hers keeps growling at mine to tell him to back off but he just carries on.
Ive had to shut them out the front room, which I never usually do, any ideas/advice before I snap? [Grin]