Nicholas D. Kristof said this quote

When anesthesia was developed, it was for many decades routinely withheld from women giving birth, since women were supposed to suffer. One of the few societies to take a contrary view was the Huichol tribe in Mexico. The Huichol believed that the pain of childbirth should be shared, so the mother would hold on to a string tied to her husband's testicles. With each painful contraction, she would give the string a yank so that the man could share the burden. Surely if such a mechanism were more widespread, injuries in childbirth would garner more attention.