Terms for the topic
Asexual people have a sexual orientation that is characterized by lack of or very low sexual attraction to any person. Asexuality is distinct from abstience or celibacy, which are decisions of sexual behavior based on ethics or other personal convictions. Asexual identity is also distinct from aromantic identity, which is the lack or very low romantic attraction to any person. Asexual people may have romantic attachments and may engage in sexual behavior for reasons such as romantic intimacy or reproduction. Asexual people, or "aces," are highly underrepresentated and often misunderstood by the general public, and many asexual people have found the internet an important source of community. This guide is intended to be an introduction to search methods for asexual identity and asexual populations.
Asexual pride flag (public domain)
Grey asexuality refers to the "grey area" between sexuality and asexuality. People who identify as grey asexuals (or grey-As) may very rarely experience sexual attraction or drive, may have sexual attraction but low or no sex drive, may have very weak sexual attraction that is not strong enough for them to wish to act upon, or have sexual attraction and sex drive under only very specific and limited circumstances.
Demisexual refers to people who may experience sexual attraction but only after forming very strong romantic attachments.