POPULAR SCIENCE USED TO BE MOSTLY ABOUT ROCKETS AND STUFF. NOW: How Men Learn (Or Don’t) About Menstruation. But at least the sample is scientific, right? “In their research, the scientists asked 23 young adult men — a largely white, suburban group of 18 to 24-year-olds who had signed up for a college course on human sexuality — about their experiences learning about menstruation.” Uh huh. Broad and deep.