
Wait, what do you mean alphas can't get pregnant? So alpha females are infertile?

Alpha females can get pregnant. But its harder for them to be. It is why some bloodlines have pure Alpha families. A male alpha marries a alpha female and have alpha children.
Usually in many omegaverse stories though, in pure blood families, omegas are shunned or disowned...rarely are they seen as a bonus in an Alpha dominate family.

Well by logic standards...its omegaverse XD. None of it is really logical. Especially when so many authors do omegaverse but always switch around the rules.
The most common ones are
Omega
Beta
Alpha
And its yaoi so this almost always mostly aimed at men. But there have been a few series that have gone into very light details about females.
This includes Alpha females having a tendency to being less fertile than beta and of course Omega. Just because they are female doesnt change the fact they may have issues.
Even in some omegaverse an omega may have a harder chance of getting pregnant if he isnt at his most fertile point.

I'm confused, why can't he reveal that he's a human? It seemed like at the start of the story if anyone found out he's human they'd kill him. Is that what happened to all the other humans? Why do they keep calling making out "eating"? Is that just what they call it? If making out with a human helps your horns not hurt why would you need to hide your human status? Wouldn't that make humans a coveted group?

He could tell them he is human, but since they are so rare in that universe, he would definitely become a source of interest and might even be bullied for it (imagine how autistic people sometimes go their whole lives pretending to be abled to avoid annoyances). Humans just naturally became scarce, probably due to intermarriage with demons, who had stronger Gene's and so on.
The making out being called "eating" was mostly born bc the uke thought demons would really literally eat him if they found out he is a human (he had this idea bc his brother teased him as a child and he believed him), so when he was kissed he thought it was it, but how he just goes with it as quirk. The seme, being the dense idiot he is, keeps calling it eating bc he can't see he's in love and just kissing his lover.
I love bad ass bitches, you go new uploader. Smth tells me we'd get along great