Answer:
I am carried by mad animals.
To cross the water I'm the way. For water I'm above I touch it not and truth to say I neither swim nor move.
I may be made of metal, bone, or wood and have many teeth. My bite hurts no one and the ladies love me. What am I?
I fly when I'm on and float coming off.
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?