Can saliva kill precum and or sperm?

I heard people saying that saliva can kill sperm cus is so acidic. is that true?? and can it really kill precum more than sperm it self? also how effective is 1 month on BC?

Saliva doesn't kill sperm.

The acidity levels of the saliva vary depending on your health and nutrition, but in no way has it ever been acidic enough to kill sperm.

1 month on birth control should render you safe, so long as you've taken it as prescribed and are not on any antibiotics.

Saliva is not normally acidic, it's neutral or slightly basic. It would have little effect on sperm, in fact, they would find it much more friendly than the vagina, which normally is acidic. If you're a sperm, you definitely want to be the first to the egg, but the trip is through some rough acidic uncharted waters, you gotta be tough.

As mentioned, one month, all things being normal otherwise should be safe.

Oh, and even if saliva could kill sperm well, I don't see how that would work to stop pregnancy. It only takes one tough little dude to get through.

thing is I never really came untill after which was no where near her vagina. we wanted to see what anal was like but all I did was press down once and thats was it cus nothing happened im just worried tho my girlfriend said my dick made NO contact with her vagina and plus thats why I asked about the BC 1 month thing. what you think would be the chances??