The King of Fashion --- He will be going through life commenting on fashion as He sees it. He comes here with no formal training in the matter, but He still does not think that makes him unqualified for the position.
The absolute number one way to make a sexy over the knee boot un-sexy is to NOT have a heel on them. The whole purpose of the over the knee boot, a la Pretty Woman, is to actually have it look sexy. There is close to zero sex appeal of an over the knee boot that has no heel. Might as well be wearing a pair of uggs.