Condom
A condom is a thin cover that is put on a man's penis and used during sexual intercourse. It can also be used during oral sex, anal sex and masturbation. It is normally made of latex. Condoms are a form of birth control, they can prevent a pregnancy. They can also prevent the spread of certain  sexually transmitted infections, such as  gonorrhea, syphilis, or HIV.  Another name for a condom is prophylactic sheath, or simply a prophylactic.