For everything, there is a Venn diagram. Boingboing reader Ken Hooper points us to scientific prioritization of pottymouthfulness:
In soccer, spitting and swearing are serious fouls. Swearing is penalized by referees with various degrees of rigor. This site is for the instruction of referees–it's a sort of English Football Profanity Matrix complete with Venn diagrams. My friend Tony Cullen from Liverpool assures me this is not a joke of any sort, but it's hilarious. "Bitch" is worse than "shit" but they are both eclipsed by "bollocks" in terms of being offenses likely to be carded.