In the American special forces branch of the Navy, you receive extra Sausages, Eggs And Lard (S.E.A.L) in your rations, so these people are called “Seals”.

Obviously, after a few years of eating so much extra greasy food, they’re no longer capable of participating in military operations, so tend to retire and write books about what they did at work.

I think that’s correct anyway - don’t quote me on it.