Answer:
Everybody's got one.
Long and thin, red within, with a nail at the end.
Nothing specific, but more than a few. This many clustered, together will do.
What can you hold in your left hand but can never hold in your right hand?
What has hands but canβt clap?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.