Your penis into your partner's anus. 2. Use a condom Even if you are in a monogamous relationship, you should use a condom along with a good lube for anal sex. This is both to avoid sexually transmitted diseases, but also to avoid spreading Astraea Eye Serum bacteria from the rectum. Remember that you must never use the same condom in the vagina and anus due. The risk of bacterial infection in the vagina. In order to feel extra clean, can possibly. have a packet wipes at hand. Safe sex is the way forward for both a good experience and for your health. 3. Use a good .