@StarRegulusNoir@devoutsodomite Colloquially known as "cream", what you're seeing here is the foaming of the rectal lining. Friction causes the coating inside your bum to foam up into a white, low viscosity fluid. And when you're aroused like he is... It's just gonna happen a lot quicker with more cream.
@midnitexclub I have no idea how the fuck any of this is possible, I am always perplexed and I am kind of curious to know how this looks through an x-ray