"This is a hell of a story of President Tyler, our 10th President, born in 1790- I met one of his grandsons many years ago and was stunned-- apparently they are still alive and kicking. His son was born late in life and the son sired two sons in his late 70's. President Tyler is known for three things-- one for siding with the south in the Civil War 2) getting a trophy wife Julia, ( from Long Island of Gardiner Island fame) producing 13 + kids, and 3) probably the genetic source that was the basis for discovering Viagra."