Dang, not the kind of punch line that should be punctuated with a rimshot, but it should be acknowledged somehow...Speaking of knobs, here is an old one:
I was having a lesson with a bass instructor. She told me that most guys play bass with a pick - she reckoned that this was because they learn the wrist action naturally during adolescence. I noticed that she played fingerstyle. I asked "Did you learn that finger action during adolescence?" She nodded sheepishly.
https://www.youtube.com/watch?v=8K9PN4xJEN4