Honestly, if you are dating an athletic young woman in exquisite health, I’ll often grate some of the dried flesh from the edges of her feet. They have to be clean, but the skin has concentrated pheromones that have been compacted into the dead flesh like bread pudding. The skin cells dissolve and add a bit of body but but the pheromones remain. It sounds absurd, but I’ve watched time and time again as a few spoonfuls of a sauce with some qt “foot-parmesan” and everyone becomes as amorous and touchy-feelie as if they were on ecstasy.