Possible cause of Uterine Prolapse

Of all the suggested causes of the Uterine prolapse ,can ,THE LENGTH OF THE ERRECTED PENIS be a cause ? As the avarage length of the Vagina is about 3 - 4 inches ,but the length of the errected Penis  can vary from 4 to 8 + inches.So during sexual intercourse, can there be exessive  strechings  in the supports of the Uterus ( Upword Prolapse or -ve prolapse )? As the sexually active couple has Intercourse  for  years and years .

These  may be aggravated during delivery or may further land up in laxity in the supports.. Can any one comment ?