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When you and your buddy both jerk off at the same time and your arms are all tangled up like a mess of spaghetti and cum.
I was Jack'n and Jill'n with my best friend in the bathroom. We both got off and it was like a cum explosion.
My brother and I were Jack'n and Jill'n in the closet. We were so loud the neighbors called the cops.
My girlfriend and I were Jack'n and Jill'n on the couch. We both came and it was like a double cumshot.