Query: why "salt and pepper" but not "pepper and salt"?

[RonButters at AOL.COM]

In a message dated 5/18/05 10:31:04 PM, stalker at MSU.EDU writes:


> I would agree with your supposition.  Note that people who are graying 
> won't
> likely be described as having salt and pepper hair, but more likely pepper
> and salt.
> 
> Jim
> 

Doesn't the stress pattern have something to do with it? Who ever heard of a 
Pony and Dog Show? Who remembers buggy and horse days? Is anybody tired and 
sick of all these questions?