I don't think it's really all about pleasing the girl for me. I enjoy the taste, textures, smells, visuals, sounds, responses* and perceived "connection" involved in eating pussy, which is all relatively selfish. There is, no doubt, an element of pleasure in pleasing her, but essentially that in turn is pleasing ourselves and fulfilling our own need.
*Assuming all the aforementioned elements to be positive.
*Assuming all the aforementioned elements to be positive.