You are mixing nature's intent with man's/woman's desires; albeit nature made it pleasant to encourage participation. Again from a biological standpoint men and women fit nicely for the purpose of procreation as nature intended. And as nature intended eventually the old boy and girl's seed /eggs wear down and are unlikely to breed the best of a species and so well you know the rest of the story. Anything beyond that is made man.

Why are men using Viagra? Perhaps it is because they are afraid of growing old? Perhaps you should take a survey. I start by giving you my response. I don't take Viagra. Sex is still in my life but it is not a priority in my life . And quite frankly I believe this nation is too obsessed with sex. There has been only one woman in my life and my love for her has always centered on her heart and soul. Perhaps its why we remained together for so long?