Skeletons do not fight
Why don't skeletons fight each other?
They don't have the guts.
Who told it first?
Origin not traced yet
Unknown
Told everywhere in slightly different wordings. We have not found its earliest printed source yet, so we cannot say who told it first - and we do not claim nobody did.
Something wrong or missing? Entries are corrected when a better dated source turns up. Request a take-down.