According to this article on Live Strong,
children have an average saliva pH of 7.5, while adults tend to be more acidic, with a saliva pH of 6.5 or lower.
Even though a pH of 6 is not very acidic, would someone be able to burn a hole in wood, for example, by applying enough saliva to it? Would the low acidity of saliva do nothing to the wood? I would assume, using common sense, that this would not be possible or else we would all have holes in our mouths (ew). However, would applying enough of a sufficiently concentrated solution for enough time to wood make it possible to burn a whole through it? If this is somehow possible, what would be the necessary conditions to make it happen in real life?
Thanks a lot in advance for any responses. All are greatly appreciated!