In November 1916, Lawrence Sperry, who had already made history as the inventor of the autopilot, entered the annals of aviation a second time. A prurient daredevil, he found that his new device facilitated a midair assignation with a female flight student—thereby unofficially inaugurating the Mile High Club. Things almost ended tragically that day: Sperry's boat plane went crashing into a New York bay, where two bewildered duck hunters saved the naked couple.
Unfortunately, for those willing to risk it, "there is no such official club per se," says San Diego-based businessman Phil Kessler, who owns the U.S. trademark for "Mile High Club." Still, his eight-year-old website, milehighclub.com, offers "MHC"-branded merchandise and lists dozens of stories about World War II soldiers trysting over the South Pacific to married couples spicing up their summer vacations. No doubt Sperry, who died in a crash seven years after his inaugural rendezvous, looks down at this with lusty approval.