Using saliva, olive oil and vaseline during sex is very unhygienic and could lead to infections and other risks.
But most people won’t listen, so here are the consequences of what you are doing

Saliva contains digestive enzymes that can cause yeast infections or bacterial vaginosis.

The bacteria in your mouth is different from the one in your vagina, please understand this.

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STDs like HPV, Herpes, Syphillis, Chlamydia, & Gonorrhoea can be transmitted through saliva. So even after using protection and your partner uses saliva on your vagina that’s how you get STD.

Vaseline and olive oil should not be used as lubrication as it invites bacteria to set up an infection.

Vaseline weakens condoms as petroleum jelly, the main ingredient of vaseline is not compatible with condoms. The condom may break or tear.

The surest way is using lube, preferably a water based lube as it contains mostly water.

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Water based lube is easy to wipe away and clean up, safe to use with condoms and prevents friction and makes the vagina wet allowing for a pleasurable sexual experience.

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