Answer:
Once you know it exists, it no longer exists. What is it?
Women don't have and don't want it. Men get it but sometimes they try to get rid of it. What is it?
What can travel around the world while staying in a corner?
If you can get this professional's attention you can get where you need to go for a price.
What is not a ball but yet a sphere, and holds all lands and people year after year?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.