Answer:
A mechanism to discover who is following you.
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 comes one time in today, three times in tomorrow and never in the future?
It covers you, you lose it every day and you'd die without it.
I'm a small ring shaped fried cake, often with bavarian cream or fruit filling, and sometimes covered in icing and sprinkles.
What never gets any wetter no matter how hard it rains?