The "average size" is usually over-estimated. Small guys don't take part in surveys and big guys jump at the chance.
Girl claims she had a huge ex? Stick a spider in the bathroom or a mouse in the kitchen and when she comes out screaming ask her how big the spider/mouse was...
If God is all powerful, then the devil must be nothing more than a darkness in the mind of God, however if the devil is something real and seperate, then perfection is impossible and God cannot exist except in the aspirations of fallen angels.