It's funny sometimes what we take for granted and believe to be "universal" knowledge when in fact everything is so relative. For example, I recently had some visitors from non-Western cultures and their reactions to Moo made me realize that house pets are not universal.
For example, Moo fell in love with one guest. Initially, the guest was alarmed when Moo jumped next to him on the couch and laid out in all of his Moo-y glory to be petted. I asked him if he wanted me to remove Moo. He didn't, but was worried that Moo was going to bite him. "No worries," I said. "He's super friendly."
Indeed, Moo and the guest became very good friends in a short time as the guest petted Moo. However, he was worried about Moo, asking if something was wrong with Moo's breathing. I listened and laughed. Nope, Moo was just happy and purring! My guest comes from a place where there are cats but they are usually feral so he hadn't encountered purring before. I'm glad that Moo was such a good pet ambassador.