Could viagra (sildenafil) for a man just keeps him hard til he orgasms or does it stay hard for another go ?

Here are some ...: Viagra (sildenafil) is only enhance the natural process of erection, but such effect depends on the degree of personal functional deficit at the time taking it. So, it may not work for some; once it works, most men will reach orgasm; afterwards, he needs a rest to allow the body to replenish the needed energy & ability to recycle sexual arousal & orgasm. The pace of such recycling widely vary among men...