John the shop assistant blushed as he turned towards the stockroom to locate the extra large shoe shelf. He couldn't shake the thought of those huge feet he had just seen. As his fingers pulled the door handle, he felt a sudden rush of blood to his nether regions. "Umm yikes that's awkward!" He thought as his average-sized 5 inch boner began to swell against the fabric of his dress pants. He looked down to see the outline of his cock head bulging out from the front. He quickened his pace towards the proper shelf and grabbed the extra large box, holding it in front of his crotch in order to hide his excited manhood. As he swiveled around to make his way back out to the shop, Genie appeared, her size 16 feet baring all. Her sexy, red pedicured toenails glinted under the bright storeroom lights. The stunned assistant dropped his gaze to eye her silky, snow-white feet. "Teheehee like what you see?" She giggled, wiggling her toes again. It was more than John could take, and he lunged forward in lust towards her delicious feet, kneeling before them and feeling them up and down in his hands. "Oohh!" She squealed. "I can tell you like them." Genie had a thought: "let's give him an exact copy of my feet!" All of a sudden, John felt a draft across his toes. "My shoes and socks are gone!" He exclaimed in astonishment. "They sure are, and things are about to change" replied Genie. John's cock was now straining against his pant leg, begging to be let out. "While I'm at it, let's make you nude too, just for fun" she winked. Suddenly all of John's clothes disappeared and he felt a gradual tingle - starting at the tip of his toes, then arcing across to his heel. For 15 exhilarating seconds, his feet felt completely numb with all the tingling, until it came to a sudden stop. "Check em out!" Genie giggled. John looked down upon his nude body, first at his crotch to gaze upon his finally free, shaved, five-incher for a brief second before laying his eyes upon his newfound silky smooth, perfectly pedicured feet - with cherry red toenails matching Genie's exactly. "Woah!" He exclaimed, feeling a surge of excitement in his cock. "Ohh I bet you'll like this! Let me make one more change" Genie purred seductively as she lowered her face to John's newly enhanced feet. As she began to lick his feet, John fell into a dreamy pre-orgasmic bliss. "That's right, I made your feet as sensitive as your cock, and your cock as sensitive as your feet used to be! I swapped their sensitivities!" Sure enough, as John grasped his junk in his hand, he no longer felt the same pleasure, it just felt like touching any other part of his body. He moved his hand down to his pedicured toes and caressed them, feeling a sudden surge of arousal. "Mmm, oh yeah" he moaned.