I fantasize that I'm a certain person during a time period (Ninja, Arabian warrior, Native American warrior, Klingon/Romulan from Star Trek, etc). I'm captured and tied down by an enemy of some sort. They play with my footwear first (licking between the split toes of my ninja tabi boots, massaging my moccasins, sniffing my feet in my sandals, etc) before removing my footwear and placing a device around my feet. This device looks similar to a box with a funnel at the bottom. This device gets really warm and humid inside and my feet sweat uncontrollably. My foot sweat constantly drips down (with occasional mistings of water) and my foot sweat is collected. The enemy takes cups of my foot sweat and drink it like an elixer or ambrosia. Every now and then, they open the device and take a big sniff inside to see how stinky my feet are getting, sometimes taking quick licks to my soles and toes. Meanwhile, I'm helplessly tied down as this is done to my feet, but they feed me and give me drinks to keep me alive.
So basically, I'm a factory for their special drink.