Scientifically speaking, what's the evolutionary reason for women of African descent having more compact, tighter, stronger vaginal cavities than women of European descent?
https://www.ncbi.nlm.nih.gov/pubmed/24464469
>PFM (pelvic floor muscle) of black women were stronger than that of white (p=0.02) or mixed-race (p<0.01) women.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2593128/
>The pelvic inlet was wider among 178 white women than 56 African-American women (10.70.7 cm compared with 10.0.0.7 cm, P<.001). The outlet was also wider (mean intertuberous diameter 12.31.0 cm compared with 11.80.9 cm, P<.001).
https://www.ncbi.nlm.nih.gov/pubmed/24464469
>PFM (pelvic floor muscle) of black women were stronger than that of white (p=0.02) or mixed-race (p<0.01) women.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2593128/
>The pelvic inlet was wider among 178 white women than 56 African-American women (10.70.7 cm compared with 10.0.0.7 cm, P<.001). The outlet was also wider (mean intertuberous diameter 12.31.0 cm compared with 11.80.9 cm, P<.001).
