"In the grand scheme of things, I think they will have forgotten it by next week," Lacey told "Good Morning America Weekend." "Sixteen, 17 years ago we were pondering over the fact that his father had been caught on the telephone talking to his mistress saying that he wanted to be a tampon inside her. We heard about his mother talking to lovers on the telephone. I think this is all part of what we rather enjoy in Britain about the royal family."
Third in line to the British throne, Harry may have "spare heir" syndrome, according to Lacey.
"The queen had a younger sister Princess Margaret who was known to drink too much, who had a toy-boy boyfriend," Lacey said. "It's part of how you live with an iconic family. You've got to have that black sheep, and Harry certainly lives up to that."
The Associated Press contributed to this article.