They don't have much of a smell or taste. To help prevent STD transmission during oral sex, place some spermicide on the inside of a non-lubricated condom. Non-lubed condoms are good for folks who want to add their own or who use them for oral sex. Condoms, come in a variety of shapes, sizes and colors. Reservoir-tipped condoms have a small nipple at the end, designed to catch the sperm.
Sufficient lubrication is the key to preventing most breakage.
To increase lubrication, add KY jelly, any water-based lubricant or spermicide. Do not use vaseline or other oil-based lubricants as they will cause breakdown of the condom fabric. Place the applicator on the top of the can and press down or to the side, depending on the package directions. The plunger will rise as the applicator fills. Insert the applicator about two or three inches into your vagina and press the plunger to deposit the foam over your cervix.