mason jism line


the area on a woman’s body above which she is not okay with a man shooting their load after pulling out before climax during intercourse. usually the br–sts or upper-chest; a woman’s acceptable c-mshot boundary.
a verbal play on the mason dixon line that was the dividing line between the northern and southern states during the u.s. civil war.
man: “she won’t ever let me c-m on her face.”
friend: “what? really? what about on her t-ts?”
man: “yeah, she’s okay with that- she just tells me to keep it ‘below the mason j-sm line’.”

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