“To the wise, a prick on the finger avoids a hole in the heart.”
“You can prick your finger… Just don't finger your prick.”
Class Clown (1972)
Context: And the other two-way word is "prick". It's okay if it happens to your finger; yes, you can prick your finger, but don't finger your prick!
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George Carlin 270
American stand-up comedian 1937–2008Related quotes

“You hit somebody with your fist and not with your fingers spread.”
Man schlägt jemanden mit der Faust und nicht mit gespreizten Fingern.
As quoted in Die Deutschen gepanzerten Truppen bis 1945 (1965) by Oskar Munzel, p. 209; this indicated the need to concentrate tank forces for one strong push in one direction and not distribute them over a large area.

“You put your hand on Corinne's back like this again and I'm breaking your fingers.”
Source: Reflected in You

Bruce Lee: Enter the Dragon (1973); In a training session with one of the temple students.
Variant: Its like a finger pointing away to the moon. Dont concentrate on the finger or you will miss all that heavenly glory.
Source: Striking Thoughts: Bruce Lee's Wisdom for Daily Living

“You must have stuck a finger up your arse at least once.”
HermAphroditeZine, Autumn 1999