Illustrated by Jordy Van Der Nieuwendijk.Sometimes, sex is sublime. You're in sync with your partner, in the moment, and loving it. But, other times, sex is awkward, gross, or even painful — remember that time the perfect position was suddenly ruined by a searing muscle cramp? Redditors came together to compare notes on the worst parts of doing the deed, and our friends at Nerve chose the 12 worst of the bunch. Click through to Nerve to find out which ones made it into the hall of shame. (Nerve)