SDMU-710 Why dont you fix the 250000 rpm electric machine in a position such as a Y-shaped bridge where the vibration is most transmitted to the uterus and keep applying it? 5 people total 64 times

After investigating which is easier to feel between the strength and weakness of the popular electric machine, we challenge further pursuit! - This time, we will greatly increase the number of revolutions and investigate which posture is most suitable for feeling the stimulation of electric power! - The result was that the tide leaked more than the last time, and the climax was repeated by panting. - Please use it as a reference when using the electric machine!