The Choo Choo Nipple-Clit Vacuum Suction Set from the Japanese brand A-ONE is compatible with any gender, regardless of nipples, areolas or clitoris, it fits perfectly! Made of simple and lightweight plastic, easy to clean and maintain, it is a good helper to add fun! It is an indispensable prop for you who are prone to sensitive nipples! Let your partner admire your sensitivities that have become red and enlarged from the vacuum-sucking congestion!