 [ Symptoms ] problems keeping an erection i am an 18 year old male i weight 133 pounds and i am 58 i have problems keeping an erection it will get hard but it gets soft rather quickly without stimulation like a few seconds when it is hard it usually stays a sort of mostly hard but still soft penis i smoke cigarettes and marijuana but not to the extent where it would cause major damage i exercise 2 3 times a week and eat healthy although i do indulge in some junk food could i really have erectile disfunction at my age [ Disease ] i am sorry but i do not understand your question can you please explain by re posting