DoctorDerivative 's definitions
The scientific application of measuring anal play enjoyment of a male subject by holding their flaccid member from behind while simultaneously applying pressure between their cheeks. The weight and growth measured during direct contact via the holder to the hole from behind is what is calculated using this method.
“I found out recently at my derivative appointment that a tongue punch to my fart box is 6x just a finger insertion!”
by DoctorDerivative August 18, 2025
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