A male condom is a thin sheath placed over the erect penis. When left in place during sexual intercourse, oral sex or anal sex, male condoms are an effective way to protect yourself and your partner from sexually transmitted infections (STIs). Male condoms are also an effective way to prevent pregnancy.Condoms, also called rubbers, are usually made of latex, but some are made from polyurethane or lambskin. Latex and polyurethane condoms provide the most protection against STIs.Male condoms are simple to use, inexpensive and widely available. They are available with or without a lubricant and come in a variety of lengths, shapes, widths, thicknesses and colors. Some condoms are textured to increase sensation.