RE: ( why do you think he left) Testament to a deer hearing.
But you see, you're trying to make something up that isn't the case. These critters live in this weather their entire life. You say the deer looked and then left. If your theory is right the rain was coming toward him. What that gets you is the wind was blowing towards him. He smelled your butt. He didn't turn in fear and flee the wind and rain. He left your scent cone.