Condoms provide great protection from both pregnancy and STDs. Condoms are small, thin pouches made of latex rubber , plastic polyurethane, nitrile, or polyisoprene or lambskin, that cover your penis during sex and collect semen cum. Condoms also prevent STDs by covering the penis, which prevents contact with semen and vaginal fluids, and limits skin-to-skin contact that can spread sexually transmitted infections. Using condoms every time you have oral, anal, or vaginal sex is the best way to reduce your chances of getting or spreading sexually transmitted infections. Condoms protect you and your partners from STDs by preventing contact with bodily fluids like semen and vaginal fluids that can carry infections.