Cracked.com has a story about “6 Presidential Secrets Your History Teacher Didn’t Mention,” and Number 6 is a doozy:
Lyndon Johnson Was a Dong-Waving Sex Machine
Johnson was a sexual beast, and also fond of (literally) waving his dick around.
While other unfaithful presidents were satisfied with little affairs here and there, Johnson’s bevy of babes was referred to by his male aides as a harem (he was said to be jealous of Kennedy’s womanizing ways and wanted to top him). Johnson would make passes at secretaries, and it was known that any who accepted would be promoted to private secretary, two words that in this context should probably have air quotes around them anytime they are uttered. By the time he was done, virtually all of his secretaries, plus his two mistresses, got the Johnson Treatment.
He then tasked the Secret Service with keeping his philandering from his wife, but it obviously did not do a good job at that.