Bad use: John likes to finger puppets in front of the kindergarteners.
Still bad, but appropriate use: John used finger puppets to entertain the kindergarteners.
When you stretch your urethra and put a finger down your pee hole to the point where you are rubbing the mans penis that is currently having anal sex with you.
When a male or female is asleep beside you, you stick your forefinger inside their anal gland (with no lube) and see how many knuckles you can get in before they jump. Knuckle depth can be measured by the shit stain on your finger.
Male
Last night Liam passed out at the party! You'll never guess what happened, Joey have him a Chocolate Finger Puppet and got third knuckle!
Female
Arnold's misses fell asleep watching Netflix facing him. It was a prime opportunity for a Chocolate Finger Puppet but he had to improvise with a reach around.