I believe that deer will smell your breath (coffee or not) if they're downwind and you're a mouth-breather. Breathing through your nose should keep the coffee scent to a minumum. I had the "other reason" give me a fit yesterday in the morning. I had about 3 or so cups before heading out and it was telling me that I would need to get down and use the TP that I always carry for an "emergency." Just as I hung up my bow to get down. "HE" appeared at 25 yards. He was headed to the scrape at 18 yards which would likely have resulted in an 18 yard broadside shot at THE BUCK I've been after.

He saw my movement when I hung up my bow whcih ruined the moment and the "perfect" stand.![:@]