Exodus 33: 21-23 : And the Lord said, “Behold, there is a place by me where you shall stand on the rock,.and while my glory passes by I will put you in a the left of the rock, and I will cover you with my hand until I have passed by..Then I will take away my hand, and you shall see my back, but my face shall not be seen." This verse and many other verse in the Torah suggest that God has a form. Since the Christians and Muslims accept the Torah they have to accept this fact as well.
@Sha : pls stop quoting irrevelant facts. The Puranas describe stories that are mythological for moral messages only. The burning of Kamadev means that we should overcome lust. Even a child will understand this simple fact. Your 99 names of your god doesn't shed any light to the topic above.