As an American, the UK does tend to be a little snotty when it comes to other royal houses. Like they can't bear that there isn't the richest, oldest, grandest, most powerful etc.
Monaco is tiny but it sure as heck is rich so Prince "can't keep his pants on" and his predecessors must know what they are doing. And people who live in the UK with their royal house of constant divorces, scandals, tell all's, and tampon conversations, really shouldn't be throwing stones at Monaco. I personally think both royal houses need to learn some decorum and class, but I live in a country were one of its greatest presidents famous lines is "I did not have sexual relations with that woman".