Fun Factory - B Balls Duo - 肛塞 - 紫色

Wasn't sure about the flat base at first but it makes sitting and wearing it way more comfortable than I expected. The two rolling balls give this subtle shifting motion that's honestly more fun than buzzy vibration.

Those two internal balls roll around with every move I make and it's honestly a much more natural sensation than any vibration I've tried. Wore it out for a few hours and nearly forgot it was there until I shifted positions.

The flat base makes this way more comfortable for longer wear than I expected, and the two inner weights shift with every move instead of just buzzing away. The motion feels surprisingly natural, closer to pressure than vibration.