PE works better for unmarried men
Okay - that is a stretch but married men do have significantly lower testosterone levels. I wonder if that reduces gains from PE?
A man’s testosterone levels drop significantly when he holds an infant. Even holding a baby doll can decrease levels of the male virility hormone.
Married men, whether fathers or not, have markedly lower testosterone levels than single males, according to one of the first studies of how the hormone changes when men marry and become fathers. Results of the study, done by a team of Harvard University anthropologists, increase our knowledge of human biology and may have implications for so-called “male menopause.”
Researchers have long suspected that levels of the hormone largely responsible for fighting, competing, and mating decrease when men settle down and start a family. Other studies have shown that testosterone begins to decline shortly after marriage, but surges upward when unions end in divorce.
“It makes sense,” notes Peter Ellison, professor of anthropology. “Lower levels of testosterone may increase the likelihood that men will stay home and care for their wives and kids, while decreasing the likelihood they will go out drinking with the guys and chase other women.”