This story about her & President Reagan is making the rounds. I wonder if it’s it true.
The Queen decides she wants a Kentucky thoroughbred in the royal stable, so she calls President Reagan, who decides to meet her in Lexington, Kentucky. When they get there, they decide to go for a ride.
They're just pulling out of the barn when the Queen's horse's tail goes up and "Lbbttt!"--out comes a monstrous fart. The Queen says, "I'm so embarrassed!!" Reagan says, "You shouldn't be!! I thought it was the horse!!"