Responses
It was because of his mental resistance. his heart had fully accepted Jing, but his pride as a man, particularly as an ex Bandit King always hinder him from getting the full pleasure from being topped by another man.
Jing also knew about this, that's why Jing used aphrodisiac to make him gave in to the pleasure and loosened his prideful self.
But Jing still loved to torture him in his loving way, to annoy Lu Cang. XD
for those who have read the novel, please answer me this: why does it seems like anal sex was still painful for Lu Cang even after five years of being together. I know that he starts to enjoy it in the middle but it seems that it always hurt in the beginning which i don't get since it seems that the emperor had started using lubrication after confessing his feelings. does Lu Cang just like pain so the emperor give him pain that turns into pleasure? (he did fall in love with the emperor at a time when the emperor showed him littler to no gentleness) or does the emperor just get lost in his own pleasure and forget or disregard Lu Cang's pain? (it does seems like the emperor get lots of pleasure from Lu Cang's expression of pain that turns into pleasure) I mean after five years of hardcore sex almost everyday, multiple times a day, i would think that it wouldn't hurt anymore