This is the one bone of contention among real golfers. Do you get a mulligan (a "do over" for non golfers) on the first tee or not? When you have a recent President of the United States who takes a mulligan every time he hits a shot that doesn't suit him, what are you to do?
I say, one mulligan on the first tee, and that's it. Unless I am up first and hit a great drive, then I say, "No mulligans; ever again in this group!"