My daughter likes to pretend.
Practically every waking minute is spent pretending to be jellyfish or unicorns or She-Ra.
One day, she decided to give us a little role reversal. First, she told my wife that she was the daddy. So, my wife tried to deepen her voice and increase the frequency of cool and leaving off the "g" in -ing words in her vocabulary. Then my daughter turned to me and said, "Daddy? You're the mommy." Since I already have a high voice, it wasn't much of a stretch. So I tried to act sweet and nice and completely enthusiastic about everything she did.
A few minutes later, I took her on an errand to a store. All the way there, she kept saying things like:
"Mommy, are we going to the store?"
"I like your hair, mommy."
"Mommy, will you read me a story?"
This was all fine until we pulled into the parking lot and I realized the disastrous effect her little game could have once we were in public. So, I told her, "Ok, when we get into the store, I'm not mommy anymore. I'm daddy."
Fortunately, she picked those 30 seconds of the day to listen and actually got the message.
I can only imagine the looks I'd get if she kept referring to me as the woman of the relationship.