Answer:
Metal or bone I may be, many teeth I have and always bared. Yet my bite harms no one. And ladies delight in my touch.
My teeth are sharp, my back is straight, to cut things up it is my fate.
Though blind as well, can lead the blind well.
My first is in some but not in all. My second is into but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing, rugs used every day.
Searing 'cross the pitch-black skies, I scream in celebration, Yet moments later, my outburst through, I am naught but imagination.
What can never be put in a saucepan?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?