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

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?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

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

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What am I?

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