I'm not able to do sex for the last few occasion . my penis is not getting harder. i am 37. i got married in 2002. we do it twice a week.

See answer: Difficulty obtaining and/or maintaining an adequate erection affects all men at various stages of their life especially as one gets older and with mature relationships. Causes often a combination of physical (vascular disease, dm, htn, cholesterol, obesity, low t, meds, tobacco/alcohol) and psychological factors (stress, anxiety, depression). If ed problem persists, would recommend see a urologist.