what is this tortoise's malfunction?

Mating behavior.
That turtle is horny, and obviously confused since it is trying to fuck a cat.

>>2319874
My understanding is that tortoises are basically horny all the time, is this true

>>2319897
Don't know, possibly.
This webm has been posted before, an anon experienced in reptiles explained that it was mating behavior, and supplied links to back up the claim. I was really bored and checked them out, but I don't remember anything about them being horny all the time however, but I guess it's possible.

>>2319897
This would make sense, seeing how often they try to mount shoes.