I discovered MST3K over 35 years ago when I was engaged to my wife. We were at her parent’s house and I tripped across it. She and her folks were at the kitchen table watching me laughing so hard I couldn’t breathe.
When I was going to college in the 1980s I worked in a TV shop. The TVs ran all day and for some reason always seemed to be playing MST3K. I caught a few minutes of an episode and have been a fan ever since.