Contraception aids are hardly known from Prehistory. The Greek and Romans used different ways of not getting pregnant: medicins, special positions, periodical abstinence, as well as amulets. If this failed, even then they already used abortion. Especially prostitutes used contraception, a child meant for them often a loss of income. These deceitful techniques were used in the Middle Ages as well. The oldest known condoms were found in a latrine in the UK and date to 1640–1650. They were made of pork intestines. The condom was mainly used to prevent sexually transmitable diseases. Good condoms however were very expensive and therefore only for the rich. The first rubber condoms did not appear until 1844.