I apologize in advance if this is something totally obvious and has been known since ever. Anyway, here it is how it works. Put one leg up and grab your dick through that leg. Pull it back behind your cheeks and put the leg back to the floor. IMPORTANT: your legs must be as close together as possible. So it is similar to the behind the cheeks stretches. Now comes the slight modification that really adds a lot of stress to the ligaments. Start by hooking the ligament with the other hand. Finally, squeeze your legs together. Remember that your legs must be as close together as possible. Squeezing your legs will somehow pull your ligaments down, while you are hooking it and pulling upwards with the other hand.
Sorry if it sounds complicated, but it's really easy. Try it and tell me what you think. If you didn't know it already, that is.
Sorry if it sounds complicated, but it's really easy. Try it and tell me what you think. If you didn't know it already, that is.