I read it before but forgot the name and have no way of recollection. English is not my first language but I tried my best.
The mc is a priest(?) or something similar and their city praises him because apparently only people like him who are blessed can get pregnant/only male who can get pregnant (i can't remember which of the two) and it only happens once in generation or something.
One scene that I remembered is that they had sex in a place similar to a greenhouse...? It has these flowers and plants everywhere and a marble(?) table, the space is also closed to I believe its a greenhouse or something similar.
It didn't take place in the modern world that we live in, its a little older than that but not entirely historical. I can't describe it but the settings is similar to isekai settings; no phones, villages, worshipping.
Sounds like it might be “Arrogant otto the 1st” by Akger
Here’s link https://www.mangago.me/read-manga/arrogant_otto_the_1st/
But I could be wrong
Idk . . . The torso of Carvel in the last chapter, specifically the shoulders looks odd, and the limbs of MC is somehow weird if not inconsistent. Still, good porn, turned me off though when the art threw me off so I just read it for plot (disappointed that he did not give birth)