Gizmo, From what I've heard it can go one of three ways: 1.) Older men - even some well into their eighties - who are still interested in having sex and who are still able to "perform". Viagra would likely be of benefit to these men. I had an uncle who died at age 82. His somewhat younger (but not THAT much younger) widow was hysterical at the funeral home - crying around and mumbling plaintively, "Who will I have sex with? Who will I have sex with?" The rest of us were kind of rolling our eyes, trying to shut her up as the priests came walking in. 2.) Older men who are still interested in having sex but who are no longer able to "perform". Viagra MAY be of benefit to these men. Nobody can really predict when things like this will happen. Sometimes illness or medications will cause it. Once recovered, abilities may return. 3.) Older men who are just no longer interested in sex. This can be due to the commonly seen hormonal changes associated with ageing, some medications, physical illness, pain conditions, and psychological distress.