I don't think it does much good to try and focus on the exact usage of a particular word in the thread title, Furcifer's creative interpretations notwithstanding. Although that was a good try, Sling.
The content as well as the intent of the OP was straightforward and unambiguous.
http://www.nd.edu/~wcarbona/Haidt%202001.pdf
Are our feelings and intuitions about particular behaviours
a better guide for what acts we ought to prohibit or condemn
than rationally evaluating whether there was any harm from those acts?
The example chosen was provocative, but I don't see why that makes it less relevant. It might even be better that it was provocative. That means it isn't as easily discounted as unimportant.
To me the question seems to evoke a test of "ickyness" in some people, where reason and critical thinking are okay up to the "
too icky" threshold, and quickly disregarded beyond that.
Then, when the same tests are applied in analogous situations with the same answers they are somehow magically 'different'.
Even the potential birth defect argument has some weaknesses. Is it moral to let someone with Huntington's disease reproduce? Their kid is going to have a 50/50 chance of dying from an incurable, slow, protracted and cruelly debilitating disease.
Of course, most of the time (at least until gene testing was developed), it would be too late, because the onset of Huntington's is usually in the mid thirties, so any kid(s) has probably already been born, also with a very high probability of passing on the disease.
Is it moral to let
that one reproduce?