Male Condom - a latex sheath placed over an erect penis to prevent the passage of sperm during intercourse. Polyurethane condoms are available for those who are sensitive to latex. Besides total abstinence, condoms are the best way to prevent the passage of sexually transmitted diseases, especially HIV.
Condoms with spermicide are most effective against unwanted pregnancy. Condoms are available without prescription anywhere from pharmacies to grocery stores and are sometimes free in clinics.