Methane Exchange


when you are eating a girls -ss out and she farts in your mouth. you then hold the fart in your mouth and p-ss it from your mouth to hers.
“man last night this chick and i were f-cking, but she farted in my mouth when i ate her -ss out”
“did you swallow it?”
“nah, man i just did a methane exchange and gave it back to her.”
“nice, dude”

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