Clean riddles with simple answers

What goes up and down the stairs without moving?

He has married many but has never been married . Who is he?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

What does man love more than life, Fear more than death or mortal strife. What the poor have, the rich require, and what contented men desire. What the miser spends and the spendthrift saves, And all men carry to their graves?

What letter is a drink?

It has only two bones, but there are 1000s of ribs. What is that?

Two men are in a desert. They're both wearing backpacks. One of the men is dead. The man who is alive, has his pack open. The dead man's pack is closed. What is in their packs?

Re-arrange the letters, O O U S W T D N E J R to spell just one word.

There is a word and six letters it contains. Take one away and twelve is what remains. What word is it?

What word becomes shorter when you add two letters to it?