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. Condoms are one of the most commonly used non hormonal contraceptives that prevent pregnancy and the contraction of STIs. They may seem relatively straightforward and simple to use but there are many External Condoms YouthCO Original Non Lubricated Condoms Classic Condoms Trojan