My bird book is wrong also! I wonder if me and @That_Bug_Guy have the same book. Lol!
“Uh, actually, the possum isn’t a tick vacuum, the study that claimed this was flawed… but you should still totally think possums are awesome! Please!”
As originally used though, the expression has a connotation of an attraction to something potentially harmful. Shakespeare captured this sense of the moth metaphor in The Merchant of Venice:
Thus hath the candle singed the moth
O, these deliberate fools, when they do choose,
They have the wisdom by their wit to lose.