Next time you’re working your way through the Kama Sutra with your lady, make sure you use extreme caution when she mounts up for the cowgirl position (her on top, straddling you).

A study published in Advances in Urology found that penile fractures (ow!) were 50% more likely to happen when partners were in that position.

A better move? Try reverse cowgirl, where she faces your feet. Or, if that's not doing it for your (or her), here are eight other sex positions that will.