At the request of SOD sexual science laboratory, we conducted a demonstration experiment for sensitivity coordination between men's nipples and penis. Try a variety of stimuli, such as rolling, knuckle, cone, stirring, and sucking, and check the chimp reaction with eyes, mouth and wagina. Although there is no private affair recently, we will send you a research record of the type production department AP that touches the nipple unconsciously so as to make the penis sensitive.
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