Have you ever been to a party or function where the Master or Mistress of Ceremony cleans his/her sweaty face with their hands or shirt/top?
This is what is regarded as bad manners. For the love of the people at the function and love of the camera man doing the coverage, would it not be nice to simply invite some random person over to the stage to perform while they go take care of their sweaty face?
It is bad manners and outright disregard to the people at table with you or at a function, watch you clean your sweet with your hands because sooner or later you will shake somebody’s hands and pass the sticky waste in their hands, which is not nice at all.
The right thing to do if you forgot your handkerchief, is to go into the restroom or toilet, rollout some paper towel or tissues, stuff them in your pocket - that way you improvised by using tissue instead of your hands, which is far better. Correct?