The application of urine as a form of sexual activity. Urolagnia is considered
pretty taboo, and in the UK, the BBFC refuses
point black to pass any film, pornographic or not, involving this scene, not
even at "R18" (equiv. of "XXX" rating in US).
BBFC report on the thought-provoking chef d'oeuvre "Liquid Love" -
"When submitted to the BBFC the work had a running
time of 239m 35s.
To obtain this category cuts of 121m 0s were required., some or all of these cuts were substitutions. The cuts were Compulsory.
Cuts were required to remove scenes of urolagnia in accordance with the current interpretation of the Obscene Publications Act and to remove sight of abusive and degrading activity (gagging during
deep throat fellatio) in accordance with current BBFC classification Guidelines and Policy. R18
sex works
may only be sold in a licensed sex shop."