Answer:
They make no sense at all, In them you either fly or fall. They make you do it all. Their need is biologic, but they are most illogic. They are not real but still can be achieved, If they are just believed
What is often returned, but never borrowed/
What has a bell but isn't a church. Is full of air but is not a balloon?
Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not
When it is alive we sing, when it is dead we clap our hands. What is it?
I have two eyes in the front and a lot of eyes on my tail