@Alachua said
@SwitchableSusie Even so, shouldn't one be concerned about acquiring another's fecal microbiota?
Not as long as you are healthy.
If you are in a husband and wife/married/cohabitating relationship, kiss and have sex, you already share most of your bacterial species from your mouth, genitals and colon. That's NOT my opinion. That is a FACT. You also share the same bacteria with YOUR DOG!
My husband and I are not concerned about each others flora.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3628085/
https://www.health24.com/Lifestyle/Healthy-you/couples-end-up-sharing-the-same-bacteria-20170731
https://www.sciencedaily.com/releases/2017/07/170719113300.htm
https://microbiomejournal.biomedcentral.com/articles/10.1186/2049-2618-2-41
https://www.newscientist.com/article/2077496-your-immune-system-becomes-like-your-partners-when-you-cohabit/
https://www.statnews.com/2019/04/05/your-sexual-partners-can-change-your-microbiome-a-new-study-in-mice-finds/
https://www.dailymail.co.uk/sciencetech/article-4711836/Couples-live-share-MICROBES.html