Daily Riddle

1)What gets fat without eating and cries when not sad. What gives birth without concieving and shouts when not mad?

2)I am long and slender. Add a quater turn to my knob and you get one. What am I?

3)If you allow me to live I shall not live long; but if you kill me I shall stay longer. Who am I?

There is something hidden within these riddles. Can you find it?