Condoms are an essential part of sexual health, offering protection against both unwanted pregnancies and sexually transmitted infections (STIs). However, it's crucial to understand that condoms are not 100% effective. Here's why Birth Control Bingo: Spermicides Scarleteen Always using condoms is one of the most effective ways to protect your sexual health. They're easy to find, easy to use, and help keep you and your partner safe. Learn more: Condoms protect against unplanned pregnancy and most sexually transmitted infections, including HIV, gonorrhoea, chlamydia, and syphilis. Use only water or silicone based lubricant with a condom during vaginal and particularly anal sex.