"What? I call bs" Jen retorted.
"It's true! You were diagnosed with a rare illness at birth that means you need to masturbate constantly in order to keep your horniness in check. If you stop, you'll end up just rubbing your bare pussy against anything, and offering yourself to everything with a dick."
"Oh, my, god! That is s-oh gr-oh-ss" Jen said, already 2 finger deep in her twat. "As if is ever stop masturbating."
"You also feel compelled to have guys fuck your ass while you masturbate, to help with the excessive horniness, of course"
"Well, duh! Ungh-ooh" Jen was getting close to coming, "wanna come over and give me a hand?