Oil and Dinosaurs cont.

I just asked someone I know if they thought oil came from dinosaurs. They said yes. I said how. They said...after a very long pause...that the dinosaurs slowly sank and more dinosaurs on top of them sank. I said why did they sink and not just rot on the surface and get eaten by bugs like everything else on earth that dies. They said...after another long pause...that they were so big that they had time to sink before they got completely eaten.