Answer:
They don't forget.
I can 'fly' underwater and have eight arms. What am I?
When I'm metal or wood, I help you get home. When I'm flesh and I'm blood. In the darkness I roam.
What spends the day at the window, goes to the table for meals and hides at night?
It is a big and bulky mammal, And has a trunk just like a tree. Will store water in its nose, Which is long and like a hose.
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.