Yes, the vagina contains lactobacilli:(good bacteria) which helps in making sure the vagina is intact
They are also found in your intestines. It is also found in yoghurt
Lactobacilli protects you from infections
This kind of bacteria is known as the probiotic
But protect against CANCER? No!
If you say vaginal fluids help protect the way yoghurtsl does, you'll probably have to drink enough it to get enough protection, if you get my drift
Same with other STDs
Also, to protect yourself during oral sex sex you can use a dental dam, here's how to make one
aprokodoctor.com/2019/04/07/how…