Sex addicts will first of all be extremely preoccupied with their own sexual fantasies. This preoccupation leads them to search for sexual expression of their fantasies. They will devote more and more time to the preoccupation until they get to a point where sexual thoughts and activities are the central organizing principle of their lives.

How will someone else notice this? There are many ways. Is there pornography of any type around? Do they watch sexually explicit videos? Are there X- or R-rated videos lying around? Do they point out or notice sexually oriented places like bookstores, massage parlors or striptease bars? Do they do "double takes" of attractive people? Does their conversation seem to center on sexual activity?

If you are this person's sexual partner, does he or she ask for sex incessantly, or never ask you? Does he or she complain about lack of sex or ask for sexual practices that you don't enjoy?