Lyric discussion by patrick9241 

Cover art for I Palindrome I lyrics by They Might Be Giants

I see this song as saying that the mother is already in the hospital, and her son is trying to finish her off. The "bulletproof dress" could be one of the lead aprons that are used x-rays. I picture the snake heads as the Caduceus (☤) that features two snakes facing each other, and is often used erroneously as a symbol for the medical profession.