I shave every day, but my beard stays the same. What am I?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

Who has married many women but was never married?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

No matter how little or how much you use me, you change me every month. What am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?