Remember the song "It's not unusual to be loved by anyone?"
Not even Tom Jones would have imagined the blossoming relationship between two huge residents of a zoo in Kenya.
Factoring their ages and you get a really wacky situation.
Here's Jeanne Moos with the story.
This is an odd couple that makes that other "Odd Couple" seem bland.
Maybe you've heard about the baby hippo that fell for an aging tortoise in Kenya.
And here's how they got that way. Just over a year ago, when a tsunami's waves hit Kenya's shore, Owen the hippo was separated from his family.
He had to be rescued by villagers using shark nets.
They brought him to Heller Park Animal Preserve, where he made a beeline for Mzee the tortoise, even though the tortoise...
...was hissing and rebuffing.
But the hippo glommed on to the tortoise.
The tortoise relented and their cozy photos made them a world famous couple.
Now, Mzee and Owen sleep together. They wallow in the pond together.
Owen tends to follow Mzee around like a love-sick dog.
A two-year-old hippo and a 130-year-old tortoise --
their age difference puts even Michael Douglas and Katherine Zeta Jones to shame.
I've seen Mzee put his head into Owen's mouth, and this is a hippopotamus that could crunch his head, but he doesn't.
They're extremely trusting of each other.
Dr. Paula Kahumbu is Heller Park's expert on the pair.
They even munch on the same branch.
Back when they first got famous, a then-six-year-old girl in New York saw pictures of the two and asked her dad if they could write a book.
Now, Scholastic is publishing it, a children's picture book.
It's almost surreal what's happening between these animals, they're developing their own form of communication, which has really sort of baffled the scientists.
There are plans for Owen to be introduced to a female hippo named Cleo to teach him hippo behavior, because he's acting too much like a tortoise.
When Owen wants Mzee to move, he nibbles on his foot.
Scientists say the amazing thing is that a cold-blooded reptile would warm up to a mammal.
Slow and steady doesn't just win the race, it wins the hippo.