This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American
On supporting science journalism
If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.
I'm over at Neurotic Physiology today for Friday Weird Science! You might think that oral sex, though possibly fun, wouldn't be a very evolutionarily USEFUL thing to do. But you're wrong. Especially if you're a fish. Head over and check it out.