With Spiders, to Know You Is to Spare You: Casual dating can be dangerous. A study of spiders shows female wolf spiders will eat strange-looking males that try to mate with them, but spare and even hook up with familiar-looking males.
“Hebets painted the legs of male spiders either brown or black with nail polish …. the females were more likely to eat males painted with the ‘wrong’ color instead of mating with him”.
POLLENATRIX 