Buu laugh reacted to one my rants months ago so I guess they lurk. If we get a national geographic section in place of a sex scene next year, you're welcome.
Pretty much guarantee Luna's time is coming next Chapter on her date. Amelia might take a little bit longer due to her position; guess we'll have to see.
It was speculated, but not confirmed, in Discord that his father may have done something to him to prevent him from impregnating anyone, since MC's children would likely also be much more than human. That might interfere with his father's plans.
Or perhaps he has to do something more to impregnate a woman than is normally needed, like infuse them with some of his divine essence. Remember that the process for Castiel to impregnate MC's mother was not the norm.
Edit: There was also this comment regarding the goddesses:
Knowing the way this plot goes sometimes, daddy probably magically sealed the kid's cum somehow but if he conquers a kingdom with his cock it'll undo the seal.
That or a triple blowjob from the three goddesses.