An unappetizing observation

If you drink enough tea and throw up often enough, the tea starts tasting exactly the same going up and going down.

One more interesting thing about vomiting: bulimics are often warned that vomiting will damage their teeth (I assume because of the acidity), but we never hear any such warnings issued to people who are eating or drinking acidic stuff. Is vomit on average more acidic than, say, carbonated beverages or citrus juices?