What are sexually transmitted diseases?
Sexual activity often involves getting close to another person. Being close allows infections present in one person to be passed on to the other.
You can’t be much closer to someone than, when you are sexually intimate, so it isn’t surprising if germs can get spread that way.
Anyone having sex can get a sexually transmitted disease (S.T.D.) from an infected partner, if they do not use any protection (e.g. condoms).There are at least 25 different S.T.D.’s which are all spread during sex, this can mean through vaginal intercourse, oral sex or anal sex.