It's a source of amusement for us at the core of the team and it's sort of true. But it's not a command, it's a request.
Almost everybody has a reaction to a yawn. You may be yawning right now, just reading this. But I have some sort of physiological quirk that renders me instantly exhausted and droop like a wilted flower if I witness a yawn. I don't know what it is or why it is. Maybe it's because I'm tired all the time from my shift, and so are my colleagues, so much so that we no longer even need to yawn. We wear our fatigue like a badge of honour and it's almost annoying when someone endures our hours for one morning and can't get through it without wagging their uvula at us every few minutes. So I ask that people please try not to launch a big, gaping, open-mouthed moaning yawn in front of me so I can keep what's left of my energy up on the morning show.
I've been known to duck behind a computer monitor if someone forgets. I always tell them it's my problem, it's my quirk, but it would really help me if they would try to remember. It's kind of embarrassing. It's extremely potent, though, and most of the team members are great about it. When Lisa's around, they stifle their yawns. One day, I'm going to have to see someone about this. A hypnotist? A sleep disorder expert? Just who one sees, I'm not sure. But I keep reminding my apologetic colleagues that the problem is mine, and I thank them for their cooperation in keeping the 680 morning show a yawn-free zone!