Lyric discussion by anomalous3 

Cover art for Reptile lyrics by Nine Inch Nails

hmm.....from personal experience with someone like this....my understanding is someone very weak but very strong, someone who has been beaten down so many times that they lose their humanity and become reptilian, but one (trent in this case) can still love her in an odd way, a consuming way. It ties in with the idea of the sacred whore, the magdalene idea, except it is more of a corrupted version of such, as are most NIN songs....songs of beauty lost.