What is the cleanest part of a woman ? If freshly washed, her pussy, her mouth cavity contains 100 times more microbs, than her pussy. The most prone opening to give you and her, medical problems, is her ass (antibiotics do not work on that, consult your doctor). So if you want to have anal sex, that is great (vast majority of ladies claim that anal orgasm is WAY stronger than vaginal orgasm), what ever touches the ass, has to be washed before touching her mouth or the pussy again.
Plese, no ATM, for your own health. Exception: you use a condom when in her ass, and get rid of it to get a blowjob and feed her.
If you go for anal, I strongly recomend aloe cream, wears better than the lube, you do not have to interrup to add lube.
If you like to have mfm, or more partners, invest in a mattres topper, at least queen size. Less sprained anckels, and less broken bones.
Have fun gang