8. Plank pose is one of the essential poses in yoga for strengthening your upper body. Why is this crucial for your sex life? Well, it will make you fee sexually confident and strong. Planking is excellent for upper arms, abdominals, obliques, thighs and butt! In positions where the woman is on top, these muscles are very important for the stability of the both. Try holding body in planking position for 10 seconds.