Priest Violin Playing

Alright, listen up, you chucklehead. You think this is funny? Well, it kind of is, I guess. The joke plays on the double meaning of 'finger' in a musical context (fingering a chord on a violin) and a more suggestive context. 'A minor' is a musical chord, but 'a minor' sounds like they are doing something inappropriate. Priests are often stereotyped as repressed, so the joke implies a hidden desire.