Do all monkey paws grant wishes?

[Airstrip One]

Or is a particular species of monkey or a rare mutation?

Is it the left paw or the right paw, or both, that grant the wishes?. Six wishes per monkey is double what you would get from a genie.

Are monkeys who have been taught sign language able to wish on their own paws?

Do monkeys even know that they are capable of granting wishes?

Could the rarity of wish-granting monkey paws be explained by young monkeys squandering their wishes on frivolities such as big bunches of bananas?

 

[Apu Wrangler]

Free ones are kind of risky, otherwise they're all fine

 

[Dysnomia]

Just don't ask for your dead son to come home and you'll be fine.