Condoms are thin, flexible barriers made from materials like latex or polyurethane. They are primarily used during sexual intercourse to prevent pregnancy and reduce the risk of sexually transmitted infections (STIs). Condoms come in various sizes, textures, and flavors, catering to different preferences and needs. To use a condom effectively, it should be placed on an erect penis before any genital contact occurs. Proper storage is essential; condoms should be kept in a cool, dry place and checked for expiration dates. When used correctly, condoms are a reliable method of contraception and protection against STIs.