Condom is called condom in English vocabulary, and it is named after its inventor Joseph Condom, a British doctor in the late 7th century. Condom The condom invented is made of the caecum of lamb. First, cut the sheep intestines into proper lengths, dry them in the sun, and then soften them with oil and wheat bran until they become thin and elastic. Because Kant invented the condom and was knighted by King charles ii of England, his invention was praised as a "pleasant invention" by Chinese people. However, historical data show that Kant is not the originator of condoms, because similar "sex tools" are depicted in the works of art in ancient Egypt and Rome. This earliest condom was made of animal bladder or swim bladder. 1492, sailors from Columbus brought syphilis back to Spain from Haiti in America, and syphilis spread to France, Germany and Switzerland one year later. With the wings of love, syphilis swept through Europe. 10 years later, the virus conquered the whole world. In this regard, people responded quickly. Gabriella Fallubay (1523 ~1562), a professor of anatomy at the University of Padua in Italy, invented a condom made of linen. Fallubay claims that the purpose of this invention is to prevent sexually transmitted diseases, followed by contraception. During the period of 155 1 ~ 1562, he investigated 1 100 people who used this condom, and the results were satisfactory. Therefore, some scholars believe that the invention right of condoms should belong to Fallubay. Early condoms were mostly made of flax or sheep intestines, and were gradually replaced by latex condoms after entering the19th century. The first latex condom was invented by Dutch physicist Dr Aleith Jacob in 1883. At the beginning of the 20th century, with the development of latex technology, the production technology of condoms has also improved, but its thickness is 0.06 mm, which makes couples often unable to "enjoy themselves". 1949, the Japanese took the lead in developing "ultra-thin" high-quality condoms with a thickness of 0.02 mm. Soon, Russian manufacturers were ingenious and produced condoms with many tiny latex particles or linear surfaces. Condoms come in many colors, including red, pink, light blue, lavender, goose yellow, black or transparent latex. It is reported that Japanese prefer black, Haitians prefer transparent color, Kenyans like red, while China people basically use latex primary colors, and few are "colored". In recent years, various shaped condoms developed by manufacturers have brought new feelings to couples' lives. For example, a new type of condom produced in the United States has a much smaller rubber band diameter than the condom body, and its purpose is to effectively prevent the penis from becoming soft due to blood backflow. There are also special-shaped condoms with thorns in different parts and larger particles. These things are soft and generally won't hurt the vagina. Some condoms are covered with a "needle" about 1 inch long, which is suitable for some middle-aged and elderly women with too loose vagina after delivery and women with frigidity. Recently, an artificial penis extended condom appeared on the market. Its head is made of soft rubber and its sleeve length is about 15 cm. This kind of condom can meet some sexual psychological needs of some men and women. Nowadays, condoms add many new functions on the basis of contraception and prevention of sexually transmitted diseases. Some women will produce antibodies to sperm, which will lead to the rejection of "sperm" and "egg" and lead to infertility. If the man uses condoms for a period of time, the antibodies in the woman's body will gradually disappear, and then take off the "coat" and it is possible to get pregnant and have children. Therefore, among these people, condoms have become "pregnancy-promoting condoms". It is reported that the incidence of cervical cancer in women who use condoms is obviously reduced, and its anti-cancer effect has been affirmed in the medical field. At this time, condoms become "cancer prevention sets". In order to make condoms play a "multi-functional" role, varieties containing drugs came into being. 1975, the British first introduced condoms with spermicide as lubricant. Then, some manufacturers in the United States successively introduced silver sulfadiazine or iodine and condoms containing other antibiotics to suppress HIV, Treponema pallidum, Neisseria gonorrhoeae and herpes virus. In order to help men treat premature ejaculation, some manufacturers have also developed condoms containing local anesthetics.