I have my slave gimpy bound up in an inescapable leather sleepsack, head immobilized and gagged, and with all his senses deprived, I want to condition him to cum with my scent. It's simple: with no other stimuli to focus on, he'll need to focus on my scent. He sniffs my armpits, my thigh high socks, and my feet while chaste and desperate, growing more and more aroused at the smell of his Mistress, until I finally allow him to lick my pits and my feet.