Suggest Treatment To Increase The Penis Size

hi , I have problem of my privet part. My penis size is to small (1.5inch).At the time of my birth my both testis are at the top and not at the normal position.After operation my both testis came to it's normal place,from that time their is no increment in my penis size.WOULD YOU PLEASE HELP ME ON THIS TOPIC. MY AGIS NW 23YEAR.CAN I SATISFY MY WIFE WITH THIS SIZE,SHULD I NEED TO TAKE ANY MEDIKAL TREATMENT (AS I AM READY FOR IT).REPLY ME ,PLESE......