Safe sex is sexual activity in which people protect themselves against sexually transmitted diseases, usually by using condoms.
People who have multiple sexual partners are now more apt to practise safe sex.
safe sex in British English
or safer sex
noun
sexual intercourse using physical protection, such as a condom, or nonpenetrative methods to prevent the spread of such diseases as AIDS
safe sex in American English
sexual activity incorporating various practices, including the use of a condom, that reduce the risk of spreading sexually transmitted diseases, esp. AIDS
Examples of 'safe sex' in a sentence
safe sex
But you do need to get informed about the risks to you and to practise safe sex.