The first sexual beings

Evolutionary scientists said sexual intercourse first started around 385 million years ago with armored fish called placoderms. In the journal Nature’s Sunday, October 19 issue, the placoderm species Microbrachius dicki (M. dicki) is the first known species to copulate for reproduction. Male fish had bony, L-shaped genital limbs called claspers which transferred sperm into the female. The females developed small, paired bones with which they locked the male organs in place in order to copulate. Placoderms ruled the world’s oceans, rivers and lakes for around 70 million years.They were wiped out around 360 million years ago in a mysterious mass extinction.

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