What is (are) the cause (causes) of finish checking?

[Seans]

I thought it was caused by Mojo!

Eden.

Mojo, I know that guy, I bought all my basses from him

[Danotron]

Most online Dealers charge extra for the "Mojo"

[rickenbrother]

Plenty of "Mojo" on my '73!

[Rickissippi]

I probably wouldn't be able to hear it, either, but it does make sense to me that the wood of a checked guitar would be breathing and moving a bit more than on a non-checked guitar.

However, I thought Ricks never/rarely checked. I thought Rick had that super-secret, no-checking finish application.