Bryan Adams’ “Summer of ’69” is such a powerful blast of nostalgia that it’s easy to assume the Canadian singer and his writing partner, Jim Vallance, wrote it about their own times as teenagers in 1969.

Only problem? Adams was only 9 years old in 1969. The song does contain some real allusions to the writers’ lives, but the 69 number was, according to Adams, chosen as a reference to the 69 sexual position.