I was in the Ohio State Univ marching band during the 1970s and early 80s. There was a trumpet player in my class that was missing the pointer finger on his right hand. So, he played the trumpet with the other 3 - shifted by one compared to others. The joke was, “What does Dave and a SS number have in common?” They both have 9 digits. It helps to have a rough sense of humor in that environment.
Why, yes, it does.
Perhaps.
Soooooo, when you told that joke, did he give you the finger?