I sent a (casual) group email out to all of the families in my class. Immediately after I sent the email, I noticed a grammatical typo (I should have had s' and only had s). My first thought was to write a short correction email. My SO thinks I am being a wacko and that it's weird if I send a correction email. What would you do? p.s. before someone says it, I did proofread but I'm exhausted and clearly wasn't thinking!