Sales Act

Today, a sales guy came to our office, he told us he is new to this industry.. but he is not new as a salesguy. There he starts to ask questions, jotting down points & so on .. But i spotted something.. I'm wondering, have anyone ever tell him that its not right to hv chewing gum in his mouth when he went out for sales to meet his customer... doesn't he know that its not quite polite chewing something in mouth and talk ? Well, i did not correct him thou as i thing im not in the position and his senior or mgmt should know abt it when they 1st brought him out with. Maybe i'll do that the next time if i see the same from him. Good Luck ... :)