The medical term for this interlocking is ‘penis capitus’. Thus reducing how much of his cum escapes and encourages impregnation. Knotting exists in a world called the omegaverse where humans follow the hierarchical structure of wolf packs:
He points out that the most common cause of couples getting stuck together during sex is a condition known as penis captivus. When this occurs this is called tying or knotting. This is known as “copulatory tie” or “copulatory lock,” and it is a natural part of the mating process for many animals, including dogs and cats.
During sex with an omega he will finish and knot her/him. Assuming it's omegaverse stuff you've seen. Especially during a heat when the omega is super needy and fertile lmao. “it is not always a myth that couples can get stuck together during sex,” says professor joachim osur, a sex medicine expert.
Alphas are dominant, sexually aggressive, and able to breed, betas are. The knot itself is a tissue that swells during intercourse and is filled a fluid that ensures it stays swelled. Penis captivus allegedly occurs when a penis becomes stuck in a vagina during sexual intercourse. The locking is completed by circular muscles just inside the female's vagina;
It occurs when the muscles in the vagina clamp down on the penis much more firmly than usual during sexual intercourse, making it impossible for the penis to be withdrawn from the vagina. Reports of this happening are incredibly rare. Can a vagina lock problem, called vaginismus, really make a man and a woman get stuck together while having sex? Clinically, sexual locking is termed penis captivus.