Uncut: not circumcised
Undinism: arousal from water and water associated erotic thoughts
Unisex: not pertaining to one sex only. Unisex clothing can be worn by both traditional sexes. A unisex hair salon invites customers of both sexes.
Uranism: arousal from person of same sex
Uranophilia: sexual arousal by heavenly thoughts
Uretha: the tube through which urine passes in both males and females, and semen passes in males.
Urethral self-instrumentation: sounding; inserting object into urethra for arousal
Urolagnia: arousal from urine either watching or drinking urine or urinating
Urophilia: arousal from urine
Urtication: the use of nettles to create extra sensation
Utopian Swinger: a person who practices swinging as a total lifestyle with humanistic ideals.
Uxoravalent: only able to attain sex extra-martially (applied to men)
Uxorovalent: able to score only with one’s wife