Sexually transmitted diseases are diseases that are transmitted by means of sexual contact. The following are common sexual diseases in men: common urethritis, the common causative agents of urethritis are gonococcus, mycoplasma and chlamydia. Syphilis is also a common sexually transmitted disease, mainly caused by syphilis spirochete infection. Condyloma acuminatum is also a sexually transmitted disease with a high incidence in men and is caused by infection with the papilloma virus. AIDS is a very familiar sexually transmitted disease that is also transmitted through sexual contact. Genital herpes is also a common sexually transmitted disease. Since sexually transmitted diseases can be transmitted through sexual contact, men must be clean, wear condoms during sex, and reduce unclean sexual practices as much as possible.