Saw this on FB a few weeks ago and laughed my ass off. The wife slapped my phone when I told her I married in the danger zone, she proved my point.
It's a poor chart, in my experience. The "NO GO" zone is not under 5 on the hottest scale, it is over 5 on the crazy scale. You have to walk away from the crazy ones no matter what they look like or there will be bunnies boiling on your stove.
That was the funniest part of the video a close runner up was when he was talking about the chics in the no go zone and said "oh and anyone named Tiffany"