There are diverse causes of celibacy (whether voluntary or involuntary),e.g. any flaw that negatively impacts sexual market value or any sociocultural, economic or personal circumstance that hinders marriage or more generally pair formation. The line between celibacy and inceldom is blurry. Some celibates might only experience inceldom some of the time. Some may lie about their voluntariness due to sexual modesty norms and social desirability bias. A rare minority reports to be truly asexual, making up as much as half of adult virgins (who are also rare). There currently is an increasing trend in celibacy. This article discusses both causes of celibacy, inceldom, and the causes of the recent increase in sexlessness (see also the demographics page for data on these trends).