At ordinary times, you should take part in more physical exercises to improve your physical fitness. When you don't have sex, you can always pinch his penis with your hands. Exercise it less sensitively. When you have sex, you can use various forms or women's positions. If the foreplay time is longer, you can also kiss the nipple and clitoris, so that women can be easily satisfied. You can also soak yourself in some medicinal liquor (6 grams of Morinda officinalis, 6 grams of Achyranthes bidentata, 15 grams of Radix Rehmanniae Preparata, and 5 ml of yellow wine for one month). This medicinal liquor is for tonifying kidney, strengthening yang and strengthening the body.