My penis does not stay hard for long during sex?

ED: You have erectile dysfunction which is common for someone your age. Get some viagra (sildenafil) and you will be able to perform well again.

Few options..: Safest and easiest/simplest to help is getting an evaluation by your doc to see if you have underlying problem--such as vascular insufficiency/diabetes/thyroid/blood pressure/testosterone trouble etc.. Once these are controlled/treated, medications such as cialis/levitra/viagra can help to improve and maintain erections. It is nothing like when u were 17, but these meds do help. Goodl luck .