Why is that when people throw up after drinking they don't get the conditioned taste aversion, huh?

Answer 1

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I think it's because people know that it isn't something dangerous for them, they know it's self inflicted, plus you are drunk when you throw up, so it isn't so bad.

Answer 2

Being drunk, itself, may have something to do with it, but I suspect that it's mainly due to the fact that you know ahead of time that you may likely throw up. Conditioned taste aversion is a defense mechanism to help us avoid things that could, worst case scenario, kill us. Given that we know this isn't the case with drinking - extreme overdrinking notwithstanding - we don't develop the aversion.