Ahh convulsion porn. It's right up there with White Girl Wonder Bread and being aroused by Danny DeVito. 3 things you probably shouldn't try w/o a backup plan.
Not even two minutes of clitoral stimulation and this Becky's pork chop piss flaps start dancing around like a mother fuckin trash compactor. I'm talking vaginal contractions, YUGE ones. So big even her sphincter joins in on the macarena.