It's similar to lacking anything else. This may be tmi, but at the moment I am lacking clothes - it's perfectly above board, it's nearly 4 am and I'm in bed. We were all born lacking clothing; that's something which we adopt later. If you lived in a culture in which nakedness was the norm, you would probably find the idea of clothing as much an alien concept as I and many atheists find the idea of belief in gods.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'