Pull a Frank

The prerequisite to 'Pulling a Frank' is being laughably dense , and generally means having a misconception of something that should be elementary and relatively easy to piece together, even for a preschooler. 'Pulling a Frank' means going throughout most of your life with such a misconception until you ask someone about it, most likely a friend.

You and your friend walk through the park.
Suddenly your friend spots a white dove.
Your friend ponders for a moment then asks you, "Hey, Stephen. Is it true that doves turn into seagulls?"
You simply reply "Why yes. Yes of course, Frank" overwhelmed by your friend's unprecedented stupidity.

That's how you pull a frank. You're now so embarrassed to be seen with him you start pacing a little faster than him, as you walk through the park.