Olfactophilia

Olfactophilia or osmolagnia is a paraphilia for, or sexual arousal by, smells and odors emanating from the body, especially the sexual areas. Sigmund Freud used the term osphresiolagnia in reference to pleasure caused by odors.

Campbell's Psychiatric Dictionary includes them into parosmias, disturbances of the sense of smell.

Etymology

 * olfactophilia – Latin olfacto, to smell, pertaining to the sense of smell, and Greek philia, "love"
 * osmolagnia – Greek osme, "smell", and lagneia, "lust"