That's cool.
I once saw two tortoises gettin' it on at the Detroit zoo a few years ago...
Warning; explicit content!
The tortoises were both facing the same direction, with one behind the other. The (male?) tortoise climed up on the female tortoise's back, the male tortoise then slid up up & down on the other tortoise's back and made wierd, low-pitched throaty sounds.
It was so embarrasing cause my 'rents were there too. I felt like melting right into the pavement. :sigh: