Answer:
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
I am full of holes but still holds water.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What am I?
I am a chair that can move. What am I?
What made Cyclops quit teaching?