Remember when every paranormal adventure novel had to have a woman with a tramp stamp, with her back to the reader? Preferably wearing tight leather pants and holding a crossbow? Those days are over.
For aesthetic reasons, plastic surgeons are sometimes required to re-position male nipples – after dramatic weight-loss for example. In such a case they are presented, in effect, with a substantially blank canvas.
Batman's chest will have special bat-cups which, ummm, lift and separate his pecs. At least he's not sporting the much-criticized nipples from 1997's Batman and Robin. New Batsuit images from The Dark Knight from Uruloki, via IESB.