*giggles* I know I am evil, but it's so funny!! I can't help myself. It's a mother's job to torment her kids, right??
I can put treats on his paws and stuff and he's alright with that, but he just really hates it on his nose, bless him!! I couldn't leave the room and expect the treat to still be there when I got back (he'd probably get up and follow me after a few seconds, anyways), but I can leave it there for AGES while I do something else.... It's one of the ways we get him to not beg while we eat, actually.
I taught the dog I grew up with all sorts of tricks, this being one of them, and he didn't look so pathetic when he did it *lol*