Let’s all take a moment to consider that someone made a page on Wikipedia about the “medical condition” known as “Involuntary Celibacy” and that there is a section on Causes that includes:
An analysis by Denise Donnelly et al. of a group of incels revealed that only 29% of virgin incels (those who had never had a sexual experience) had ever participated in kissing or other activities involving a partner. Her research indicates that as incels (and virgins in particular) miss key milestones in their sexual trajectory they find themselves on a radically different sexual development path than their peers.
Other factors, as identified by Donnelly’s 2001 life course analysis (unless otherwise cited) include shyness; inability to relate to others; poor body image; difficult living arrangements (e.g. with parents, roommates, or in an isolated area); inconvenient work arrangements; lack of transportation; disinterest in having sex in the absence of love or a relationship; commitment to a marriage or relationship with a partner who is not interested in having sex with them; reduced physical ability to have sex as a result of illness, injury or handicap, or because of difficulty in developing and maintaining erections as a result of erectile dysfunction or impotence.
Additionally, men may disqualify appealing women as “relationship material” based on the stereotype that beautiful women are less likely to be faithful as girlfriends or wives, or to become good mothers, and would be the most likely to seek divorce.