Asexuality can be defined as an enduring lack of sexual attraction. Thus, asexual individuals do not find (and perhaps never have) others sexually appealing. Some consider "asexuality" as a fourth category of sexual orientation, distinct from heterosexuality, homosexuality, or bisexuality. However, there is also recent evidence that the label "asexual" may be used in a broader way than merely as "a lack of sexual attraction." People who say they have sexual attraction to others, but indicate little or no desire for sexual activity are also self-identifying as asexual. Distinct from celibacy,...