and streets for lack of available facilities. Society and culture Unisex (gender neutral) Public toilets are often separated by sex. In many cultures, this separation is so characteristic that pictograms of a man or a woman often suffice to indicate the facility, without explicit reference to the fixtures themselves. In restaurants and other private locations, the identifications can be designed to match the decoration of the premises. Toilet facilities for people with disabilities, especially those reliant on a wheelchair, may be either gender-specific or unisex. Gender-neutral toilets are usual in cases where sex-separated ones are not practical, such as in aircraft lavatories and passenger train toilets. In the 21st century, with lobbying from the transgender rights movement, some initiatives have called for gender-neutral public toilets, also called unisex public toilets (also called gender-inclusive, or all-gender). These may be instead of, or in addition to, gendered toilets, depending on the circumstances. Many groups are re-imagining what public toilets can look like; for instance, architect Joel Sanders, transgender historian Susan Stryker, and legal scholar Terry Kogan launched Stalled!, an open source website which offers lectures, workshops, and design guidelines for unisex public toilets. In addition to accommodating transgender and gender non-conforming individuals, gender-neutral public toilets facilitate usage for people who may require assistance from a caretaker of another gender, such as people with disabilities, elderly people, and children. An additional consideration with regard to gendered public restrooms is the availability of baby changing tables. Sometimes, these tables have only been installed in women's restrooms, owing to stereotypical assumptions that only women were likely to be accompanied by babies needing to have their diapers changed. This can be an impediment for fathers with their children and other male caregivers. Advocates have worked for changing tables to be installed in men's restrooms. Unisex washrooms would provide access to either regardless. Graffiti and street art Public toilets have long been associated with graffiti, often of a transgressive, gossipy, or low-brow humorous nature (cf. toilet humour). The word latrinalia—from latrine (toilet) and -alia (a collection)—was coined to describe this kind of graffiti. A famous example of such artwork was featured on the album cover of the satirical Tony Award Broadway musical Urinetown, using felt-tip pen scribblings. As graffiti merged into street art, so some public street-level toilets began to make a feature of their visibility. The Hundertwasser toilet block is a colourful example in Kawakawa, New