Dr. Choky Ice is working on his research into new understandings of the female asshole. He proceeds with his insertions of various rubber items into Nurse Tiffany’s rosette hole. Dr. Ice knows that the ultimate test is to see how Nurse Doll reacts to a shiny metal speculum opening up her snatch, at the same time Choky’s cock finds its way into her pretty mouth. The Doctor is devoting himself to research into the mysteries of the feminine anus! Nurse Doll sucks Dr. Ice’s icicle and then takes it in her bottom while the speculum still spreads her pussy pie. She even rides his cock cowgirl style with her caboose, while keeping the speculum in her slit. Finally she gets his gooey cream in her rectum, and shows it bubbling out afterward from her well-worked rectum.