I've been trying to find an old erotica I read around ten years ago. The knight was searching for a dragon for the usual reasons, but ended up getting stripped and more or less molested by it. I think they talked about dragons for a bit, touching on their differences in reproduction. This eventually led to the knight stroking and sucking the dragon's cock, which was of course as big as himself, and he got showered in semen. I think the dragon then revealed that it was a hermaphrodite, and the knight fucked it in return. If I recall correctly, the story ended with the dragon ejaculating inside itself from this and telling the knight he had helped it impregnate itself.
Most people will think this is pretty weird, but I'm asking here on the off-chance someone else knows what I'm referencing and remembered where the hell it was posted originally.
Source: reddit.com/r/Erotica/comments/2qeqea/searching_for_an_old_story_featuring_a_dragon_and