Olfactophilia is a paraphilia that involves sexual arousal based on scents, particularly those emitted from the human body. Typically, the arousal is more intense when the odor comes from a sexual area.
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The arousal might be related to a body odour or an odour that is released from the body. A body odour might be a smell like sweat, or hygiene related odour. Others are aroused by the smells that are produced by the body, such as those produced by flatulence.