Yet it seems that banning or over-regulating this newest drug-of-choice is like trying to ban youth itself, or at least the universal desire to hold on to it.

CNN: WHAT VIAGRA CAN - AND CAN'T - DO

Kennedy's youth and charisma go far to explain his enduring hold on Americans and, indeed, people around the world.

NPR: 'Let Every Nation Know': JFK in His Own Words