A fascinating study has found that sniffing female tears significantly reduced male aggression and decreased activity in aggression-related brain networks. It’s suggested that the effect, which is caused by chemical signals in tears and is also seen in rodents, serves a protective function.
I also bet they didn’t study whether some men get accustomed to it over time after causing women to cry over and over. Or the extent of correlation between men on the low end of the curve and abusers.
Or if there was actually a chemical difference let alone one that humans could detect.