"Sex is pretty great for a lot of reasons (unless, perhaps, you're a duck), but one is that's it's a good way to dodge the effects of bad mutations."
Having lived on a campus with a duck-to-student ratio of 3, trust me, don't Google duck sex. 
http://www.scpr.org/news/2017/10/12/76575/tiny-transparent-worm-challenges-notions-about-sex/ …
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