If you are healthy then the most likely outcome is that you'd end up with a UTI (Urinary Tract Infection). UTI's can become kidney infections which can land you in hospital so it is important! Peeing after you've finished romping will help reduce the chances of a UTI as it helps flush out bacteria. Really you need to soap his penis and under the foreskin to kill the bacteria on it after anal intercourse if you are not using protection, as wiping won't get the bacteria off. As this is hardly a romantice break from your activities, I think the condom suggestion is a good one :)
Fastideous personal hygiene is the answer. Learn how to clean yourself properly inside as well as outside. I believe that transfered fecal matter is considerably less harmful if it is thoroughly cleaned away as soon as possible after it has been transferred. Big problems can start, like NGU, NSU and systititis if fecal matter is not immediately cleaned away. All of that area is warm and moist - the perfect conditions for bacteria to breed!
You can certainly transfer bacteria from the rectum to the vagina by doing this. You can prevent this by washing the penis in between (simply wiping it off isn't adequate). Another way is to use a condom for the anal sex and remove it before moving to the vagina.
My advice is, if you want to have unprotected sex, have vaginal sex first. You and your partner can get really relaxed and passionate with vaginal penetration then it will probably be a bit easier for anal penetration to take place, which is also tighter for him, so once he is in your bottom he should come off quite quickly.
liv_long It can be a more intense orgasm if done right. Also it is a tighter hole for men specailly after having sex for a while.
missziggy Please stop inbetween and take time to wipe down the penis before moving from hole to hole. You can get a severe bacterial infection that will have you very sick and miserable. Don't get me wrong anul sex is awesome but be careful about going between the two. Also you could use a condom for the anul and then take it off for the vaginal.
I want to ask a question rather than answer this question, as it was adequetely answered already. I have never had anal sex before, and am not interested. However, I do wonder what it feels like and why people do like to have anal sex. I just don't want to because it's less intimate to me, personally, so im not judging. I am truly curious...Why do you have anal sex?
It is possible that this has given you an infection - I hope not.
Best to give the penis a good wipe off after anal before going to vaginal. Wet wipes may do the job? Then add some lube to make up for what was just wiped off!
Probably best to do the same going the other direction, apparently it is possible to trasfer a yeast infection from the vagina to the anus if you don't. I must admit I haven't bothered in the past, and it hasn't caused a problem yet, but that doesn't mean much...