One misconception about what "involuntary celibacy" means is the news media stereotype and misrepresentation of it as what it refers to as "incels" which have been characterized as a small fringe of young gross, ugly, social rejects who are rightly and justly shunned by females and who then turn into violent murderers as a result. This is so completely ass backwards from reality its nearly a complete inversion of what the concept actually means.
In fact, in the broadest definition all men are involuntarily celibate at least sometimes. The term in its broadest sense means being denied access to sex when one wants or needs it. Married men, in fact, form the largest category of involuntary celibates.
According to studies, over 40% of married men have sex with their wife "once a month or less." Many no longer get sex at all with their wife.
For single men, not those "who have never had sex," but those without a steady partner or relationship the situation is even worse. Even men among the highly select group of 10 to 15% of men that most women find particularly attractive and do have casual free sex with, they often, maybe half the time, go home empty handed from a night at a bar or regular (non-adult entertainment) club. This is the small elite of men in terms of attractiveness; for the average man its obviously far far worse.
This is all "involuntary celibacy."
For purposes of this discussion, I'm leaving out prostitution, lap dances, and other commercial sexual activities. While this is technically a way to avoid unwanted celibacy, not all men want to pay for commercial sex. Many married men don't want to "cheat" on their wife, etc.
Huh?