They would probably know by the smell. Fake vomit does not smell, even if it does smell, it's not as bad as the really stuff. Ewww.... Ya the fake vomit would probably smell like rubber, while the other one smells just plain nasty. ya what the other person said. ewww.
Someone would eat vomit if they suffered from a sexual fetish linked with an eating disorder. The burning and usually nauseating sensations that surround vomit could be seen as masochistic, for it does suggest a dehumanising/self-punishing aspect.
Someone would vomit from a Gastric tube feeding because getting something shoved down your body is not a good feeling in any case.
Well they could be allergic to prawns (I am).
Sure, if you froze it in a mould. But, would anyone even want to know why you would want to?
they would because its not their own blood and they are not yet used to the new blood
why would anyone pay someone to know what they are watching on television
can Asthma make you vomit blood
If you don't like these working conditions.. quit. The factory owner would be able to get someone with an hour to take his job.
That would depend on the amount of vomit and its makeup. (Some vomit is mostly liquid, some is mostly chunks.)
To build a neon sign factory.
Because all of the green slime is in your nose.
I would think you would ask someone older then you out the same way that you'd ask anyone else out.