Answer:
You can carry it everywhere you go, and it does not get heavy. What is it?
Who has married hundreds but always been single?
What sphinxes employ and players enjoy.
I'm the start of eternity and the end of space. There are two of me in heaven and one in hell.
Tear one off and scratch my head, what once was red is black instead!
A doctor might remove one from the neck of a Dracula victim.