It's just a short PWP one shot, wherein the doctor complains about how humans having their pleasure centers in their pants is just plain inconvenient. I remember the phrase "tertiary pleasure center". Anyway, Jack correctly guesses that the doctor's primary pleasure center is his mouth, and naughtiness ensues.
I spent like an hour scrolling through the whole community back to the start, but now I'm just not able to find it. Any help is very very appreciated.
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