Sex is an integral part of many relationships, fostering closeness and intimacy, while providing the participants with a pretty darn good time. It's obviously also used as a means for procreation. But there are people who have absolutely no interest in having sex with other people - or even themselves, in some cases. A 2004 study found that up to 1 percent of the population is asexual, meaning they have no interest in sexual activity or any sexual desire. It also may include a lack of sexual orientation, in that asexual people don't identify as heterosexual or homosexual. The Asexual Visibility and Education Network (AVEN) was formed in 2001 to facilitate public acceptance of asexuality. It's possible for asexual people to be aromantic, or completely uninterested in forming or unable to form a romantic attraction to another person.