FAQ Friday: Unlike the traditional (male external condom), which is worn on the outside of the penis during sex, the internal (female) condom is worn inside the vagina as a barrier to prevent DUREX Sensi Crme Lubricated Condoms (Canada) Oil based lube can cause some condom materials to break. Always use water based or silicone lube to avoid a condom KO Self lubricating condoms may help raise condom usage