i am a 43 year old and sometime my erection is really good and sometime its a real let down now i feel like i ave to use some kind off pill just to keep it hard until my partner releases can anyone help also went to the dotor and they ran test and it came back ok they didnt find nothin wrong so now i dont know what to do but i do mastabate alot could this be why iam having this problem. and one more ? is there anything on the market that can make your penis grow? thicker