People exiting the restroom should not have to jockey their way through or collide with people waiting to enter the restroom. As of [update] , the aircraft manufacturer Airbus offered its customers the option of installing urinals in its A aircraft. Often, one or two of the urinals, typically at one end of a long row, will be mounted lower than the others; they are meant for the disabled and other users who cannot reach the regular urinals. Paying to use a toilet can be traced back almost years, to the first century AD. Retrieved 22 November 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, gender-neutral or all-gender.