Suggest Remedy To Increase Penis Size

dear doctor i would like to know how i can increase my peni in lenght and size becouse my penis not too small but my partner fill if it can increase some inches then it can be make him more satisfied.my penis lenght now normally 4" but at the pick time it will increase upto 6 inchese,if medicine can improve this then pl give the medicine name, it will helpus a lot.thank you.avi das.