Sailors can be a superstitious lot. So what's your beliefs in changing the name of a vessel?

I know of people who have done it. I know of people who won't. And I know of people who have done it only after swimming around the boat 3 times and one, who had a complete renaming ceremony.

I like to consider myself non superstitious, but why take a chance right (cisco, I'm not sure what to put at the end here. I've made a statement followed by a question. Do I put a question mark?)

Have you changed you boats name, and how did you go about it?