Inspired by this question...By cannibalistically, I mean that a full grown xeno crouches over an egg and lets it facehug him. Why in the world would this ever happen, when the reproduction is one to one, and you gain nothing?
If the egg is a queen. The queen is dead, so now you need a new one, but everything else you can facehug is either dead or has left the building. Have this scenario ever been addressed?