"Simulation Sex Toy" length will double. Female vaginal length varies. Some women vagina shallow and narrow, some female vagina is deep and wide. In the case where there is sexual arousal, vaginal average length of 3-4 inches. Once the subject "Simulation Sex Toy" sexual stimulation, vaginal length will increase, or even be increased to twice the original. So before sex, the man should make the woman full arousal, making sex more depth, both sides more comfortable. Vaginal muscles very powerful. All women during sex will use the vaginal muscles. Maybe you think, PC muscle too powerful, in fact, PC muscle so powerful. Currently "Simulation Sex Toy" is held by the Russian one of the strongest women can load 31 pounds.a