Should I hump the dog's leg, JUST to show him what it's like?

you just made my day! hahaha!!

sure, dogs need some 'exotic' action too some point in their lives

Only if you have it properly dressed for the occasion.

i tried that once made the dog hornier

LOL, certainly worth a try.

Thanx for the chuckle.

And while you're at it, don't forget to sniff his crotch.

;)

only if you two are close friends and your ready for a relationship

Maybe, but first you have to sniff his butt and lick his face.

If you do, his red rocket will probably come out!

Yes, that may work.

Get him neutered. Problem solved.