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The researchers used light touch, pressure, and yes, vibration to assess how sensitive these body parts were. They had 30 healthy women between the ages of 18 and 35 get undressed and lie on a table covered in a bed sheet. The researchers applied stimulation for 1. For light touch, the neck, forearm, and vaginal margin are the most sensitive areas, and the areola is the least sensitive. When it comes to pressure, the clitoris and nipple are the most sensitive, and the side boob and abdomen are the least.