Guinea Pigs IV, 53 min

Three beautiful coeds get more than they bargained for as squirming test subjects in a mad scheme to develop the ultimate aphrodisiac. Pert blond coed Carol (Julia Kara) tries to buy a better grade from Dr. Zak (Travis Lee) with her sweet body. Instead she ends up bound and gagged as the evil Doctor probes her limits of pleasure with a motorized dildo and other implements. Meanwhile, petite brunette Amy (Kimber Allen) and her willowy blonde friend Holly (Holly Weston) are still bound and gagged in Dr. Zak's creepy laboratory awaiting their next round of experiments. They don't have to wait long. Poor Amy is flogged and clothespinned, then strapped into an electro rack and shocked until she is a drooling heap. Her friend Holly fares no better. She is worked over with a pair of jumper cables and nipple clamps before being fed a gooey experimental love potion. Pulled taut on a restraint rack, Holly is stimulated until she is squirming in indescribable pleasure and thoroughly wet between the legs.