Just chatting to a mate and said "havnt had a cold yet this year...touch wood" and I thought, where does that come from? How is touching wood lucky? So I done a quick google and found this... Any other sayings that you wonder where they come from?
We say 'This won't buy the baby a new blanket' when we're wasting time that could be spent working (or earning) I guess. Not sure what 'shows' are, maybe it's a Black Country saying and it was shoes?