The argument…..

Doug to Liam:  "Let’s go show Mommy the unicorn."

Me: Unicorn?

Doug:  "Zoom, zoom, zooooooom."

Doug brings Liam up the stairs into the office, carrying Liam riding the rocking horse as if Liam is riding a flying horse.  Don’t freak out, the horse has a "saddle" so Liam can’t fall off.

Doug:  "See Liam riding the unicorn?"

Doug then shows me by swinging Liam riding the rocking horse through the air.

Me:  "Unicorns don’t fly."
Doug: "Yes, they do."
Me: "No, they don’t."
Doug: "Yes, they do."
Me: "No, they don’t.  If it’s a flying horse, it’s a pegasus."
Doug: "It’s NOT a pegasus.  It’s a unicorn."
Me:  "You are sadly mistaken."
Doug: "You have no idea what you’re talking about."
Me:  "You are a dumb ass."
Doug:  "You are dumb ass-ier than me.  It’s a unicorn."

Doug: "We’re outta here.  Kid, your mom has no idea what she’s talking about.  You should know that by now.  Zoom, zoom, zoooooom."

I also didn’t know that unicorns went zoom.