If you’re so forgetful that you’re incapable of remembering that a co-worker isn’t pregnant on three separate occasions in as many months, I worry about your memory and cognition skills.
With everything that you do, once the costume is on, and you're in the pretend hospital, and you're there with your co-workers, it all sort of snaps into place: Who you are, what it feels like, who these people are to you.
It's weird to have to look at another co-worker and have a silent discussion - any discussion - about how you are going to touch their genitals or allow them to touch your genitals.