Paraphilia is what psychological experts call sexual attraction to or arousal from inappropriate activities or inappropiate sex partners. Many of these are illegal if the person acts on his fantasies, such as Pedophilia (sexual attraction to prepubescent children) and Exhibitionism (exposing oneself to a person who did not consent to it). This is in contrast to a Fetish, which is a sexual preoccupation with an inanimate object such as women's panties or shoes.

the art of remembering an arousing occurrence or some porn you watched while masturbating, often handy if you have no porn or your in the shower