It's like Catnip!
OneTwo really, really, really likes Mark's feet. The sweatier the better. When Mark gets home from work and takes his shoes off, OneTwo will run over and rub his face alllllllll over Mark's feet.
Then he'll flop on his back and start gnawing on Mark's toes. It's kinda gross...but kinda funny, too. Catnip has no effect on our cats. But Sweaty Mark Feet? Heaven.
Hahaha. I love my boys.