It's non-porous and hypoallergenic, so you don't have to worry about it getting weird or irritated vaginas or penises. Silicone is also very easy to clean—you can wash them with soap and warm water, boil them in water, or put them in the dishwasher.Silicone is also extremely soft and comfortable against your skin, which makes it feel like an extension of yourself rather than something separate that's just out there hanging off your body. As a result, the most discreet adult toys are more likely to increase sensitivity during masturbation than other materials like plastic or steel (metal).