Eli5 why do we produce a lot more saliva right before we vomit?

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I’m currently suffering with a nasty sickness bug and was wondering why my mouth fills with saliva right before I vomit?

NSFW just incase

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Anonymous 0 Comments

You know how water slides have a stream of water going down them so riders don’t get slide burns? Think of the saliva like acting as that same water in the slide but instead of protecting the rider (vomit) from the slide (your throat) the saliva can protect your throat from the vomit if it can coat it sufficiently before you throw up.

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