True, but there are a lot of physiological changes that occur during birth that do not occur during sex. BTW: Your favorites are extremely hot. I cannot believe how many of them are not already in my favorites.
The vaginal canal is made to stretch, it’s how we women give birth and it goes back to normal. I also know that quite a big cock can fit as well, takes time for all the muscles and so on to loosen enough to accommodate it. 😉