In a previous blog on vorarephilia and ‘vore’ (individuals who are sexually aroused by the thought of being eaten, eating another person, or observing this process for sexual gratification; sometimes referred to phagophilia), I noted that one of the sub-categories of this sexually paraphilic behaviour was ‘vaginal vore’ in which an individual is sexually aroused by the thought of being consumed by the vagina and taken into the womb. This is commonly referred to as ‘unbirthing’ or a ‘reverse birth’ if the participants are human. Among the Furry Fandom who dress up and fantasize about being animals, the process is known as being ‘re-whelped’). A short article on unbirthing at the Oh Internet website claims that “unbirthing fetishes are most commonly found in the furry community” (although there is no evidence to support the claim.)

The simplest definition of unbirthing is that it is a sexual paraphilia that involves being ‘swallowed’ alive by female genitalia. As with most forms of vorarephilia, the paraphilia is fantasy-based as it is not humanly possible to be unborn. Most unbirthing websites feature masses of fan art and fan fiction (such as the Mindless Consumption website). However, there are also some very specialist types of unbirthing website such as the Pony Inside Story website that (predictably) only features unbirthing pony stories and art. According to the Wikifur article on unbirthing: 

“A less-common but still significant minority also practice UB-Vore, wherein the female unbirther's body ultimately consumes the unbirthed. Another variant on this is males absorbing others (generally other males) as a form of male pregnancy. This is known as cock vore and often involves hypertrophilia and/or macrophilia”.

[Macrophilia refers to individuals that are sexually aroused by giants. Hypertrophilia describes individuals – usually macrophiles – who are sexually and/or emotionally attracted to ‘hyper-endowed’ characters. Hypertrophic individuals typically feature over-exaggerated (and impractically large) sexual and erogenous characteristics]. The article on unbirthing in the online Encyclopedia Dramatica says that US grunge group Nirvana may have unwittingly started the fetish in their 1993 hit single Heart-Shaped Box from their final studio LP In Utero when they sang “Broken hymen of ‘Your Highness’/I’m left black/Throw down your umbilical noose/ So I can climb right back”. However, I know of no academic research on unbirthing although there are a number of online articles that examine the phenomena and its underlying motivation and meaning. For instance, the Wikifur article makes a number of interesting observations:

“For many, unbirthing is attractive in its symbolic meaning. The opportunity to trust someone quite literally with one's entire life, to be nurtured and protected, is what attracts the unbirthed. On the other side, the unbirther can demonstrate her care for another in a deep, trusting way, and enjoy something living inside her, a sensation often attractive in and of itself”.

For others, unbirthing has dominant, controlling and almost sadistic elements where the person being unbirthed becomes dependent upon the vaginal enveloper for oxygen and sustenance. Those undergoing unbirthing become restricted in what they can do as movement is almost totally inhibited and the senses are all but redundant having been enveloped and swallowed. For some, the age regression aspect and returning to the womb is said to be sexually arousing. As the Wikifur article notes:

“Returned to the womb, an unbirthed creature grows younger; the unbirther may choose to rebirth their guest at any point or simply regress the unbirthed past the point of conception, effectively erasing their existence. There are many variations on this theme, some overlapping with the oviposition [paraphilia]. [For others there an] overlap between fans of unbirth and those of vore lies in the endosomatophilia paraphilia, or attraction to fantasies involving complete encapsulation of a living thing within the body of another living thing. A second overlap between the two lies in absorbing or digesting an unbirthed creature: a form of genital vore”.

According to the online Nation Master encyclopedia, the term endosomatophilia (and sometimes shortened to ‘endosoma’) was coined in 2004 (although it doesn’t say by who and in what context), and is a sexual attraction to “fantasies involving complete encapsulation of a living thing within the body of another living thing” and is therefore a critical part of unbirthing and other similarly related behaviours such as vorarephilia and ‘insertion fantasies’. [According to a Wikipedia entry, ‘insertion fantasies’ refer to “the sexual desire or fantasy of having something inserted into a person in the pelvic region; usually referring to something out of the ordinary like specifically shaped foods, abnormal objects, or even people”]. The Nation Master entry claims that:

“Due to its relative youth as a fetish term, there are currently no known websites or references with focus on endosoma. Because of this, many vore sites host endosoma material unrelated to vorarephilia itself. Because vore fantasies often involve violence and/or snuff, endosomaphiles are often daunted by the overwhelming presence of vore, as opposed to other forms of endosoma. The term was created in the hopes of forming more endosoma-oriented web content, communities, and chat rooms. Endosoma is often associated with macrophilia and microphila [which I also covered in a previous blog] as a large size difference can facilitate bodily containment. Currently, endosomatophilia is most well known among furries…Endosomatophilia is sometimes misdefined as soft vore in which the prey is not digested. Also, it was originally coined as endosomaphilia, which was later found to be incorrect”.

Compared to other sexual paraphilias that have not been researched empirically, the number of online forums that cater for vorarephilia in all its sub-varieties (including unbirthing) appears relatively large with relatively large numbers of members. It is certainly an area in which I would personally like to carry out some research.

Further reading 

Encyclopedia Dramatica (2011). Unbirthing. August 14. Located at:

Oh Internet (2012). Unbirthing. Located at:

Nation Master (2012). Endosomatophilia. Located at:

Nation Master (2012). Unbirthing. Located at:

Wikifur (2010). Hypertrophilia. November 11. Located at:

Wikifur (2009). Unbirth. March 19. Located at:

Wikipedia (2011). Insertion fantasies. September 4. Located at:

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