A fart fetish is a sexual interest in flatulence, either one's own or a partner's. It can involve the sound, the smell, the physical sensation, or the social taboo around the act.
For many people with this fetish, the appeal is bound up in intimacy and the breaking of a bodily taboo, since gas is something most adults spend their lives hiding. Some enjoy the humor and embarrassment of it, others the dominance or submission implied when one person does it in front of or on another.
Worth knowing: Since this usually happens between partners in private, the main consideration is making sure everyone involved is comfortable with the act and the smells and sounds that come with it, since embarrassment or disgust can turn a scene sour for someone who isn't genuinely into it.
Also called: flatulence fetish, gas fetish, eproctophilia, farting fetish, passing gas fetish, queefing fetish