Most animals use touch, smell, hearing, taste and sight to identify and attract a mate (that goes for humans too).
This study confirms that other species suffer from one of the same sexual problems we’ve seen in our own species; male efforts to hook up can be harmful, even lethal.
It may not have been love as we know it, but around 385 million years ago, our very distant ancestors—armoured fish called placoderms—developed the art of intercourse.
GR: Hmm, so sex came long after sentience. After 385 million years we still haven’t advanced to sapience. Is that sad, or what?