Prime numbers are interesting animals. But mathematicians have the unfortunate requirement of eating. People who are not mathematicians (but not all of them) often talk about the numbers of things they eat. Telling them about prime numbers just gives them a challenge.
Some people have an incredible metabolism, which makes us wonder what is at the centre of the world. But we've only one world to make a fuck up of, and I can show you people who've much more efficient ways of doing that.
Not wanting to do the like to my domain, I'll end this here.