Half of them reported hearing a crack before experiencing pain, with some also suffering swelling. The research also revealed that the "doggy-style" position, with women on all fours, is behind 29 per cent of afflictions. Woman on top of men having sex position doesn't allow for much intimacy though as you can't have any eye contact. Comprehensive Textbook of Sexual Medicine. Each of those changes would alter the angle and depth of penetration and which part of the vaginal area and sex organs are stimulated.