Why Wine Glass Stem is so long?

There is a place where if I stand up straight, I will still be considered sideways.

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

You can see it everyday, But cannot touch it at will. What is it?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I am the fastest animal but cannot climb the tree. What am I?

Which is the smallest number that you can write using all the vowels exactly once?

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

Which fur should we be getting from the Lion?

One day Jenifer meets the Lion and the Tiger in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Tiger, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Jenifer:

Lion: Yesterday was one of my lying days.

Tiger: Yesterday was one of my lying days too.

What day is it?