Once upon a time there will have been a person who ate something, like a piece of bacon, and that bacon went into their tummy and gave them a load of energy. Then, a bit later they went to the toilet and sat on the seat and some of the bacon energy came out through their thighs. This energy hung around in the toilet seat for a while until you came along and sat down and then the little squiggly bacon energy climbed out of the toilet seats and into your own thighs.
Now, even though you didn't eat the bacon, you've got some of the bacon energy hanging around in your thighs until you pass it on to someone else. You can't destroy it, see, because it's energy. The energy didn't even start with the bacon; it started with the pig (or the mushroom if it's Quorn bacon/Fakeon) who must have eaten some swill and then had all the energy in him until the first toilet person ate it.
So your thighs are made of potato peelings and weird mushy food, which have been through a pig, which have been through someone else, out through their thighs, into a toilet seat, and out again into your thighs.
I'm not sure what this means but I'm sure it's very important so have a think and we'll reconvene tomorrow.