While results vary slightly across reputable studies, the consensus is that the mean human penis is in the range 12.9–15 cm (5.1–5.9 in) in length with a 95% confidence interval of (10.7 cm, 19.1 cm) , equivalently (4.23 in to 7.53 in) — that is, it is 95% certain that the true mean is at least 10.7 cm but not more than 19.3 cm.
研究表明,95%的人,长度介于10.7 cm, 19.1 cm) 。
影响长度因素,除了遗传,还和体重,心脏技能有关系。
胖人就小。心脏好的,就长硬。
好好锻炼身体吧
研究表明,95%的人,长度介于10.7 cm, 19.1 cm) 。
影响长度因素,除了遗传,还和体重,心脏技能有关系。
胖人就小。心脏好的,就长硬。
好好锻炼身体吧