random Words

For weeks I had It's howdy doody time stuck in my head, than it was chupacabra, and now it is machu picchu.  Does anyone else do this, just have like one word stuck in your head for whatever reason?  Maybe it has to do with Psychology, I just got a textbook I am excited to read it.  The first thing in it is about critical thinking, but I learned that it Driver's Ed.  Are they the same thing Driving and Psychology?  Alright I hope you have a lovely day!