>>11364959
Most of my favorite genital swap stories spend a lot more words focusing on the futa TF side of the exchange compared to the cuntboy TF side so I'm not sure how germane they really are to this thread but here are more cuntboy-centric ones:

* Fad of the Beaver (cuntboy TF, female on cuntboy sex, pegging): https://fictionmania.tv/stories/readtextstory.html?storyID=1629328443404669308 - This one has one of my personal white whale subjects since it's next to impossible to find stories with guys voluntarily choosing to become cuntboys and showing them enjoying their new parts along with other characters verbally expressing their attraction to cuntboys but I love finding the rare stories that actually go that route (the futa TF inverse of "girl wants a dick and decides to get one" is much easier to find content of); most TF/genital swap stories have the guy either transformed against his will by someone else or their parts are just suddenly swapped by magic and then the guy is forced to be a cocksleeve which I find fairly disappointing since I prefer stories with the angle that having a pussy is something desirable enough that guys would actually want it and make their wish happen instead of presenting it as a "downgrade" or a "loss" from when they used to have a penis.
* Reverse Universe (worldwide genital swap, futa/cuntboy): https://fictionmania.tv/stories/readtextstory.html?storyID=136985414021779984 - Cute story about a guy waking up after a lightning strike to find that he suddenly has a pussy and his best friend/crush has a penis and they end up being each other's firsts.
* Workplace Standards (futa, cuntboy TF, futa/male, futa/cuntboy): https://fictionmania.tv/stories/readtextstory.html?storyID=1515842721302634409 / https://fictionmania.tv/stories/readtextstory.html?storyID=1516442397605444839 - Part 1 is mostly futa but has a scene at a strip club staffed entirely by cuntboys who give guys and futas lap dances, part 2 has an actual cuntboy TF segment.