The cleaner she is, the lesser the risk ... but it is still there, so either minimize and accept a small risk of infection, OR use a condom.
One very important health precaution: Don't switch from anal intercourse or anal finger play to any vaginal contact without very thorough washing of the body part that contacted the anal area. This kind of contact can lead to persistent and uncomfortable vaginal infections, since anal bacteria find the vagina a very hospitable environment. Also keep in mind that a male inserting partner should urinate after anal intercourse to flush out his urethra.
To avoid transferring bacteria, use a condom and peel it off before having vaginal contact. If you remove it carefully, without touching the outside of the condom, washing is not necessary. But note that if you use a greasy lubricant such as petroleum jelly you will greatly reduce the protection afforded by condoms, since the mineral oil will deteriorate latex (use a water-based lube instead).
If you want to have anal intercourse (or vaginal intercourse, for that matter) without a condom, you need to be completely sure about the health of your partner's genital tract. If you are certain that you are in a monogamous relationship and both partners have tested negative for STD's, you can opt not to use a condom.
Anal sex is likely to be more acceptable if the receiver has had a bowel movement sometime during the several hours preceding sexual contact. Washing in a bath or using a bidet will cleanse the outside area, and inserting a soapy finger and rinsing will look after the immediate inner area. Some people use a water enema for additional cleansing, but many do not.
Posted: 01 Oct 22:29