Bro had 800 years and he utilised it fully, not wasting even a single minute!
The fact that hua cheng is canonically the best in bed out of all the mxtx tops is funny to me only because i imagine him painstakingly studying erotica novels and the kamasutra
Taking notes only he can read only because his handwriting is abysmal
Highlighting information like he's learning for an exam
Practicing dirty talk and seductive lines
All completely shamelessly because he must know all these things. Not that dianxia would ever do such things with him, dianxia's so holy and pure, but just in case! Just in case! This is just in case!
Hua Cheng is not fantasizing about it happening, this is just in case something wild happens and dianxia needs him to do this! This is purely practical knowledge!