I know this sounds a little contrary to my normal opinions, but sometimes it's better to have a little fluff - so long as it doesn't actively distract from the greater game. For instance, think of something like the Civ series, or Age of Empires. Both of them included hefty sections with historical references and general information, none of which was really important to anything. Even so, the games were made better by these "fluff" additions, even if they didn't influence gameplay at all. Having a slightly more detailed body system would, in my opinion, serve much the same purpose here. If you want to ignore it, fine, but for those people who want to know that girl X weighs 115 pounds, is 5'4", and a C cup is all the more engaged.