The best or worst I've seen was at the gate in PIT. I was filling out the logcan when the FO told me to look up. The hot blond tug driver was picking away with great intent. I was kind of appauled, but still able to continue with the paperwork. Then I hear the FO say, "Don't do it!" Sure enough I looked up just in time to see her examine the tip of her finger (too far to see the actual booger) and then plop in right in her mouth. I was very dissappointed in seeing such a horrible thing from such a lovely creature. While quite nasty, I still don't think I would be able to turn her down if ever given the chance (good luck, chump). But I would do my best to keep my tongue out of her mouth.