Answer:
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
The more you work the more I'll eat.You keep me full I'll keep you neat.
Take off my skin I won't cry but you will.
Although it sounds like I work on a transportation device I actually work in a restaurant.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.