They do indeed fuck.

https://en.wikipedia.org/wiki/Jonathan_(tortoise)#Since_2015

https://www.huffpost.com/archive/au/entry/the-oldest-animal-in-the-world-is-probably-gay_a_23251452

The tortoise on the left seems to be Harriet, one of the other longest lived tortoises tho she's since passed. I'm guessing OOP did a search and got them confused.