We cannot eat, drink soda or chew gum around them because that would be like forgetting to offer these treats to your friends when they come to your house. We must be polite. This means, no staring, which is very hard to do because chimps look into your eyes and seem incredibly human. It also means no smiling and laughing. We were told to cover our mouths if we had to smile, or to use our top lip to cover our top teeth.
Smiles are threats to chimps.
The chimps must always be dominant in their territory, so we must affect submissive posture. Never get any closer to the cages or fences than 36 inches. There are special markings on the floor and signs on the walls to remind us of this. Chimps are much stronger than humans and could do some serious damage to us weaklings. There is no loitering, or hanging around inappropriately.