In which Dad says ridiculous things

Introducing the parents to one of my committee members:
Me: Mom, Dad, meet Dr. W., he used to teach in Minnesota. Dr. W., Mom and Dad went to grad school in Minnesota.
Dad: Yeah, that was back when it only took four years to earn a PhD.

Picking up the bound copies of my dissertation:
Dad: Huh. Mine was longer.

Thanks to 3.5 years of therapy, I rose to neither bait.