12 Exercises and Stretches That'll Make You Better at Sex

How to: Hold a dumbbell in each hand at your sides, with palms facing your hips (inward). During the lift, keep your elbows locked so that only your forearms move. Curl the weights up until your thumbs are near your shoulders, then lower. (For more details, head here.)

What it targets: Hammer curls strengthen your biceps. “In positions like suspended congress (aka standing missionary) where the dominant person is holding up the submissive person, having strong forearms and biceps come in handy,” Leary says. “When looking at this position, it looks like a static bicep curl hold.”