periods inbetween letters indicate each letter is an abbreviation for a word...in this case, I'm thinking the letters in "joke" aren't short for anything.

remember, we talked about this earler.

C.U.N.T. = Can't Understand Normal Thinking

In this case, each letter in the C-word represents a word, thus it can be abbreviated and have periods inbetween each letter.

You fail, I win.