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Sex toys are not well researched—beyond this study by the Swedish Chemicals Agency—or regulated by any consumer-safety agencies. However, the anus and rectum are delicate mucous membranes that are highly absorptive and prone to irritation, and many people use their toys more frequently than 15 minutes per week. For this reason, we decided to err on the side of caution and choose toys made from high-quality, nonporous materials