CritterFunatic
Esteemed Citizen of ZV
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.
Only if the dragon would follow a strictly reptilian body plan. Especially in the Furry Fandom there's the common view, that dragons aren't necessarily reptiles, so they may have seperate openings, like an anus and a genital slit, similar like dolphins might have. But personally I'd prefer the reptilian dragons myself, so I totally see your point as well. A cloaca would only work properly, if the legs aren't exactly below the body but a bit more to the side, so the tummy would turn smoothly into the crotch-area between the legs and turn directly into the tail. But since that wouldn't happen according to this thread, as full transformations wouldn't be an option, I'd go for the genital-slit only anatomy in this case.
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.
That's what I was thinking about. Anything else wouldn't work that well without altering other aspects of the physilogy as well.