TLDR: Many studies have shown that adult virgins and late bloomers often tend to be outcasts who are unpopular, bullied, ostracized, isolated, rejected and have low status. They are the underdogs.

Here are the studies:

The Later, the Better? Early, Average, and Late Timing of Sexual Experiences in Adolescence and Psychosocial Adjustment in Young Adulthood

Another study showed that teenagers who started sex late had poorer peer relationship quality compared to early bloomers and average bloomers.

According to the study Childhood predictors of adulthood virginity: A 10-year prospective study., "The study found that, during late childhood, individuals who matured into involuntary virgins were: more victimized and ridiculed by peers as children, socially withdrawn (preferred to play alone), and also less liked and accepted by their peers." "Our study suggests that a proportion of adult virgins have been on a life-long trajectory of low integration and unpopularity among peers. This seems to extend to a lack of sexual opportunities in emerging adulthood, but more research in the area is needed to draw conclusions".

In the study

Why Do Socially Withdrawn Children Tend to Become Heterosexually Active Later than Their Peers? A Mediation Model, they found the same results: people socially withdrawn as children still didn't integrate with their peers as teenagers, and therefore didn't socialize with the opposite gender. These people were more likely to become adult virgins at age 22 or older.

Another study called VIRGINS AT AGE 26: WHO ARE THEY?, published a few months ago, showed that 26 year old virgins have low status and low popularity among their peers. They are less satisifed with their social life, less likely to live on their own and less likely to have used drugs in their life, less likely to have smoked in their life, less likely to have been drunk in their life, and less likely to have smoked weed in their life.

Also, studies show that 40+ year old virgins are more likely to be white, obese, from a low-income household, unemployed, and diagnosed with avoidant personality disorder or dependent personality disorder. 9.2% were unsure about their sexual orientation.

TLDR: see the top of the post