Shits in omegaverse

The one biting in the neck stuff to be legal mates. I wonder where it was originate. So I was making an omegaverse story, thinking maybe I should put on the neck stuff. But I was having a second thought because, the biting the neck stuff is kinda weird considering
1. Won't the omega bleed to death if they bite very hard? I saw how they draw this. A lot of blood came out. What is the alpha bit where the blood flow? Does they need to be ER?
2. Won't humans receive some kind of bacteria from the bite? Consider mouth is the most place with bacteria.

Can you give me more some ideas and stuff about omegaverse? The lore behind it or more ways to become legal mates.