There's an old joke that goes like this: “How do you stop a girl from having sex.” When telling the joke, you usually pick a descriptive modifier and insert it in front of the word girl to single out the particular ethnic group, religion, or subculture for which you want to display your gross insensitivity. Also, a graphic expletive typically replaces the word sex, preferably something with a hard “k” sound. It's a well known comedic fact that the “k” sound is naturally funny. That’s why Kellie calls me a dick head instead of a penis cranium. Although, based upon the principle just stated, penis cranium should be funny too, and dick cranium should be even funnier, but neither phrase rolls off the tongue very well. Interestingly enough, if you say the words dick cranium quickly, it sounds like it could be the name for some rare radioactive element. But I digress. Anyway, the joke is a very customizable little gag. The punch line, as many men already know, is: “You marry her.” The humor comes from its near universal truth.