Fauna775
Citizen of Zooville
Dragon genitalia is weird because it'd most likely need a cloaca to be used, and that's another complication for anything anthropomorphic, having glutes and all. Excess lymph fluid may be needed for it as well, since reptiles and the very few avians that have penetrative genitalia use that instead of blood. Even if the cloaca were placed toward the groin area, another problem arises, that being how uncomfortable it would be to be in the position to deposit fecal matter.The question is, are those genitals also fertile? I mean for an animal of their species? So, if I'd take the male genitals of a bonobo and would have sex with a female one, would I knock her up?
If the transformation was temporary or a voluntary transformation whenever I feel like it, I'd probably try out the genitals of rats, squirrels, bunnies, cats, bonobos or even dolphins, aligators, crocodiles or kaimans, just to figure out how a slit would feel like for a male to have. If fantasy genitalia would be an option, it would be especially interesting to try out imaginary dragon junk (scaled down to human dimensions of course).
But maybe it would be most beneficial to get the appropriately-species-sized genitalia of endangered species that have bonded with humans, so one may bone them and ensure the survival of their species. But that's a very specific fantasy I guess. When it only comes to aesthetics, I stated my choices above, and only if the choice my be reversible, because I became quite attached to the junk I already got...
There is one solution though, and it's having the genitalia come out of a slit and the anus being separated, similar to how cetaceans are. It takes some of the reptile/bird aspect out of it, but is the only thing that works.