A sexual erotic term for describing one's sexual orientation as the penis goes into any orifice of another person's body and then the former person pees inside to create a hot water bottle effect.
This term was used by D. Courtney from the British sitcom "Mind your language" when she was asked by the tea lady about her sex life she says," i prefer a hot water bottle". And this term clears all that she was an adventurous lady with weird fetishes.