The mysterious sex lives of dinosaurs - CNN

The mysterious sex lives of dinosaurs - CNN: But this was the first time a dinosaur cloaca had been studied, and much of the mechanics of dinosaur sex defies the imagination, particularly for creatures like the Stegosaurus, with its armored plates and pointed tail. "If the female doesn't like the male, and it's swinging its spiked tail around, that's a problem. You look at the potential angles. It could be that they moved together tail to tail for a cloacal kiss -- a quick bang and that's it," Lomax said.