Hi welcome to the health care magic In your case you can do following work up.... -Blood sugar (for rule out diabetes) -Blood pressure measurement (for rule out hypertension) -Serum cholesterol and triglycerides (for rule out hyperlipidemia) -BMI for obesity -Drug history -alcohol, smoking -stress, depression -prostate problem -Serum testosterone estimation Hence rule out above cause and accordingly treatment given It s not how many times sex done that matter but to get climax and satisfaction that is more important If erectile dysfunction more then your physician after rule out above cause can prescribe you sildenafil like drug Hope your concern solved