Festival celebrations have always served the function of loosening taboos. During holidays, people could do things that they commonly are not allowed to do. To be libertine and indulgent are usually items on the agenda.
節慶的存在原本就有打破一切禁忌的功能，也就是過節時，人們可以作一些平日不能做的事，性的開放與放縱往往也是其中一項。