How mating works is usually an omega goes into heat, or in some cases an alpha in rut, literally have intercourse. Meaning, knots, self-lubricating, is involved in mating. Mating is typically left for when lovers decide to like "tie the knot", so like marriage sex(depending on the author). Mating is like marriage sex for us, I'm not saying it always happens this way, but there is normally some sort of scenting ritual or marking, it's like an engagement. I hope this answered your question.
It did, Thank you.