If you say my name, I will no longer exist. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

During which month do people sleep the least?

If a wheel has 54 spokes, how many spaces are there between the spokes?

If an electric train is travelling south, then which way is the smoke going?

Can you find the missing piece of the Porsche?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

John was piloting a plane behind a car but was never able to overtake it. Why?