"Hey, if yawning at somebody is the worst thing that's happened to you today, you're doing pretty great as far as I can tell." Extending his hand, he introduced, "Name's Mike. How about you?"

He used his other hand to hide his own yawn - damn things were contagious. Always had been, always would be, as far as he could tell. It was some kind of universal constant: yawns were contagious, even between species.