I have a friend who is a doctor in anorectal department. Due to years of accumulation, he has also studied and experienced sexually transmitted diseases in men. He was surprised to find that many men who beat young ladies with condoms were also infected with gonorrhea, herpes, condyloma acuminatum and other sexually transmitted diseases. The reason is that the female companion's secretion is accidentally contaminated on the male scrotum or vulva during sexual intercourse, and it is not cleaned in time afterwards. If female secretions contain pathogenic microorganisms, it is likely to cause sexually transmitted diseases. So I don't think condoms are 100% effective measures to prevent sexually transmitted diseases, but at least they can reduce sexually transmitted diseases and cross-infection. Because in the absence of condoms, male and female organs are 100% in direct contact, and secretions are not isolated. If one party suffers from sexually transmitted diseases, the other party is easily infected.
In view of this, I occasionally had a whim and designed two new condoms for my friends who like to hit young ladies: A, squid-shaped condoms. This kind of condom is a squid (also called rice spoon)-shaped bag protruding from the outer edge of the opening of ordinary condoms. When wearing a condom, turning the bag over the scrotum can effectively prevent contact infection of the scrotum. B, water-shaped condoms. Similar to women's jumpsuits, there are condoms in the crotch. Originally, I wanted to apply for a national patent, but later I felt that it was not conducive to the development and production of manufacturers and made contributions to the broad masses of Huang people. It is said that these two kinds of condoms are under development and will be on the market soon.