My penis is too small..how to increase size of penis..doctor please help me?

How big?: If you have 3.0" or more, you can satisfy yourself and the large majority of partners. Average for a man is 5". A smaller guy gets harder, is less likely to incompatible with a partner and is better able to stimulate her best nerve endings which are in front. Your physical fitness and ability to use your whole body (hands, mouth) override size. Don't compare yourself to guys in internet pictures.