I'm using William's public file to see where and how to get the scenes.
I don't see the catch anal option in any of the playthroughs I have tried. I started from scratch as male/female but the option was not even there when I got to Zheng Shi. I have also tried to see if I could get it to proc when submitting to the jumpers to no luck.
I only tested it about 200 times, so I might just have been very unlucky, but I have a sneaking suspicion that the scenes are not enabled for backers yet.
I don't see the catch anal option in any of the playthroughs I have tried. I started from scratch as male/female but the option was not even there when I got to Zheng Shi. I have also tried to see if I could get it to proc when submitting to the jumpers to no luck.
I only tested it about 200 times, so I might just have been very unlucky, but I have a sneaking suspicion that the scenes are not enabled for backers yet.