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futa sex dolls are equipped with a biochemical odor module that can release the precise ratio of testosterone and estrogen. When purchasing, pay attention to the sustained release technology of odor molecules - inferior products use cheap fragrances, which may cause mucosal allergies.
Lesbian sex dolls focus on pheromone simulation, and their neck gland module contains 32 pheromone variants, which need to pass allergen detection before they can be used safely.