Add a leash into the equation and some guys are in doggie heaven and usually are very obedient doggies to boot! I like playing the handler/owner vs. the puppy!
Bouns leather pic...
https://78.media.tumblr.com/cc68955ccfcf874e978ca34f57fc1431/tumblr_p66zs1YqZE1uig6jlo1_500.jpg
PS: the guy is wearing a cock ring for those who might be interested!