To steal from one is plagiarism. To steal from many is research.

Here's my take on the left-handed thing. I skimmed thru the other replies to be sure I wasn't being redundant, but if this was already said and I missed it, I apoligize!

I think the expression could come from the Bible, in Matthew 6:3. Jesus is telling how people giving alms should not do it for the purpose of being noticed by others: "Therefore when thou doest thine alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets... But when thou doest alms, let not thy left hand know what thy right hand doeth: That thine alms may be in secret:" Whaddaya think?

Again, sorry if this was already posted!