Since I'm only adding to the necro posting and not really necro posting myself, I suppose I'll add my two cents: Unbirth is a very broad kink, in itself a subset of vore which is entering a female's (or cuntboy's body to be PC) body through the vagina, usually all the way to the womb, though sometimes left inside the vagina to be melted, absorbed, or as seen in ModeSeven's work, kept in a passage inside the vagina. Cum digestion, called cumgestion in short, is frequent, and is only one subset of unbirth. Others enjoy it for age regression, gender transformation, species transformation, absorption (whether through the uterine lining with the prey being intact, cum digestion and then absorption, regression into an ovum and absorbed through the fallopian tubes, or other method I've not come across), regression into an ovum and stored in an ovary (whether to later be inseminated and given birth naturally again or to be stored there permanently), and finally, for the purpose of nourishment, in which the passage to the womb either has the womb a digestive organ, the womb leads to the stomach, or the vaginal passage leads directly to the stomach. Vagina Dentata, also called Vaginal Hard Vore, is what is commonly thought of as vaginal vore, and generally depicts the vaginal opening as having a set of teeth to rip prey apart with. Vaginal vore where the prey is consumed without vaginal teeth is often called unbirth as well since both generally have the prey entering the sex intact and only meeting their end inside the womb/stomach/vaginal passage. While there are those who get upset about the terms being loosely interchangeable, neither definition is invalid and both can be used by members of the vore community to describe the act of pulling a prey into the vaginal orifice, as long as it's full insertion and not simply insertion, which is a fetish wholly separate most of the time from unbirth or vore. Anyways, that is my two cents.
Borrowing from an ancient meme:
https://www.youtube.com/watch?time_cont ... D6qtc2_AQA