Answer:
What do you get when you cross a cow with a trampoline?
I am shared by goats devils and unicorns.
The more of me you take, the more I appear behind you. What am I?
A trail, a union, together tied. Come across me and you will find you cannot change the course I'm on. Without me you cannot travel on. What am I?
I have a head, tail, but no arms and legs. What am I?
I am rarely touched but often held. If you are smart you'll use me well. What am I?