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Study found that compared to other body parts such as limbs, people have limited control over the penis, because it does not always obey the domination of the nervous system, but also by the "autonomic nervous system", also known as the leadership of the autonomic nervous system, which is also responsible for regulating heart rate and blood pressure.   bluetooth vibrator

Many of the autonomic nervous system arousal is "credit." For example, in deep sleep stages, the brain sends out pulses to induce an erection, weightlifting and abdomen levator ani can also promote penile erection. When you think of it smaller. American Urological scientist Dr. Montag, exposure to cold water or air makes the penis shrink, psychological stress can make it stagnant. These are dominated by the autonomic nervous system, so the penis can also be regarded as "a barometer of the autonomic nervous system."   toothbrush vibrator

It is "very low-key." American sexologist Kinsey studied more than 1,000 men found that 12% of people after erection, the penis increases less than 1/3, 7% of people increased twice. Those seemingly normal state short penis, erections may be those "big man" twice.  personal vibrators


It will also break. Although there is no penis bone, but still may be broken and sound, then becoming bruising, pain incomparable. This situation occurs mainly in young people. A typical case is the man rushed, the results hit the partner's pubic bone. To avoid this situation, do not be too rough during sex .                                                  
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