###Human: Is it normal to have erection for shorter period of time? ###Assistant: Hi. For providing you the proper treatment I need to know the answers of following questions. What is your age? How long you had been in a physical relationship? Any sexual encounter with a commercial sex-worker? Any history of diabetes and hypertension? Is the condition persistent or deteriorating with time? Does the condition remain constant with other sexual partners, if any? Smoking or alcoholic? Hyperlipidemia? On any medications or hormonal therapy? Any marked curvature in the penis? Any history of trauma, surgery or neurological disorder? Do you have any of these features: Persistent low mood, loss of interest in work, low energy, lack of concentration, disturbed sleep, ideas of hopelessness, helpless, guilt or suicide, change in the appetite, headache, forgetfulness, excessive sweating, the shakiness of hands?