The Elms was the Johnsons’ Washington, D.C., mansion and it was equipped with a shower like nothing the staff had ever seen: water charging out of multiple nozzles in every direction with needlelike intensity and a hugely powerful force. One nozzle was pointed directly at the president’s penis, which he nicknamed “Jumbo.” Another shot right up his rear. It elicits chuckles now, but Johnson’s shower fixation came to define his relationship with some of the residence staff.

