Male menstruation is a term used colloquially for a type of bleeding in the urine or faeces, reported in some tropical countries. It is actually caused by parasite infestation of the urinary tract or intestines by Schistosoma haematobium, and cases of it are actually schistosomiasis, formerly known as bilharziasis. In some tropical peoples that work in wet places such as rice fields, most boys pick up Schistosoma, and start the bleeding, about puberty when they start working in the rice fields, and uneducated locals think that it is normal and refer to it as the male equivalent of female menstruation...