Do or Will Bugs Enter "Ars" If Left Uncovered?

If someone slept naked in their bed at night and they had bugs in their home... Lets say big roaches...

Is it possible for a roach to crawl into their "ars" and start a family there?

I know spiders can crawl into an ear (or mouth or nose)...saw that on news....but what about "ars"?
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