Let it be a natural scene or a fashion model. Appreciation and admiration of beauty in general is the basis of Photography.
The tendency of a human to get attracted towards beauty has evolved from the new born child's behavior of focusing on the light and brightness. So its natural that most people get attracted towards beauty. Photography as a hobby will quench the thirst of admiring nature and beauty. I compare it with playing music instruments for relaxation.
The minute details of the photography is the difference Digital SLR makes with regular Cameras.