Answer:
A young man wants to have me but when he has me, he no longer wants me. What am I?
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
Whoever made me doesn't want me. Whoever bought me doesn't need me. Whoever uses me doesn't know me. What am I?
Used left or right I get to travel over cobblestone or gravel. Used up I vie for sweet success used down I cause men great duress.
The more of this there is the less you see. What is it?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.