There were cases of orphaned elephant calves transplanted to game reserves who grew up and took to raping rhinos because they hadn't been raised in the presence of adult elephants.
In extreme cases, rhinos who spurned the elephants' advances where attacked and sometimes killed.
Well an elephant married a Rhino,
And their kids are the strangest that I know.
All the people that saw 'um
said, "Hey, whatchu call them?"
I had to reply, "Elephino."