for patrons to steal the toilet rolls. Various contraptions have been devised to lock the spare rolls away, and release them only when the active roll is used up. An increasing number of public toilets are furnished with holders that hold very large rolls of toilet paper. Others hold two large rolls with an access door that allows the user to switch between roll one and roll two when one roll is empty. These are designed to save money by reducing the frequency of janitorial services to restock the paper. In many toilets, especially in elementary schools, a dispenser releases only a small square of toilet paper to prevent a user from intentionally clogging the toilet with large amounts of paper. Coin-operated dispensers have also been developed. Orientation Some toilet roll holders or dispensers allow the toilet paper to hang in front of (over) or behind (under) the roll when it is placed parallel to the wall. This divides opinions about which orientation is better. Arguments range from aesthetics, hospitality, and cleanliness to paper conservation, ease of detaching sheets, and compatibility with pets. The US advice column Ask Ann Landers reported that the subject was the most controversial issue in the column's history and, at 15,000 letters in 1986, provoked the highest number of responses. Some writers have proposed that preference for one orientation over the other may have connections to age, sex, or political philosophy, and survey evidence has shown a correlation with socioeconomic status. The main reasons given by people to explain why they hang their toilet paper a given way are ease of grabbing and habit. Some particular advantages cited for each orientation include: hanging over reduces the risk of accidentally brushing the wall or cabinet with one's knuckles, potentially transferring grime and germs; makes it easier to visually locate and to grasp the loose end; gives the option to fold over the last sheet to show that the room has been cleaned; and is generally the intended direction of viewing for the manufacturer's branding, so patterned toilet paper looks better this way. The under position provides a tidier appearance, in that the loose end can be more hidden from view; reduces the risk of a toddler or a house pet such as a cat unrolling the toilet paper when batting at the roll; and in a recreational vehicle may reduce unrolling during driving. Partisans have claimed