Saliva

[Tariq Zaki]

Saliva can be used as lubricant, for example a woman can spit on her fingers to [lubricate] her vagina. It should be renewed more often than a real lubricant since it gets dry faster. Lubricating correctly a pussy can prevent breaking a condom, even if the condom comes lubricated.
If the woman / man is not your official (monogamous) partner, it is safer to use your own saliva to lubricate your pussy or cock that is not protected with a condom, since there is a small risk of STI.
If you are not with your official partner, French kiss / [deep kiss] with exchange of saliva should be avoided, as well a unprotected blowjob or [pussy licking], which also adds a risk of STI.

[Cami]

Watery liquid secreted into the mouth by glands, providing lubrication for chewing and swallowing, and aiding digestion.