“Woman on top,” also known as cowgirl-style, is responsible for 50% of penis fractures during sex, according to a new study of Brazilian couples published in the journal Advances in Urology. A penile fracture is when a muscle bends sharply while a man has an erection, often causing a “pop” or “crack” sound that makes dues involuntarily cross their legs just thinking about it. (The penis doesn’t contain any bones, despite this injury being called a “fracture.”) UrologyHealth.org explains that most penis injuries occur during sex during thrusting-gone-wrong and are painful as well as embarassing. Meanwhile, missionary position, or “man on top,” caused 21% of penile fractures. But that’s still not as bad as any of these 11 worst sex positions, all of which look like they could break everybody’s penis, vagina, back and spirit.
MORE: Cowgirl Position is Dangerous for the Penis