"The BBFC is required to seek to avoid classifying material that is likely to be considered in breach of the Obscene Publications Act," the BBFC told us. "According to the advice we take from the police and the CPS, sex works featuring
urolagnia [the gaining of sexual pleasure from urination] are likely to be considered obscene.
"Therefore, unless it's very clear that what is being shown is indeed 'female ejaculation', as opposed to urolagnia, the Board's position has to be that scenes of this nature featuring liquid that might be urine have to be cut. The situation is further complicated, for us, by the fact that medical advice we have taken has suggested that some scenes submitted to us that purported to show 'female ejaculation' were, in fact, urination."
http://www.vice.com/en_uk/read/joel-golby-ejaculation-police-squirting-vaginas-jizzing-cocks-808