This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.
Why do we not allow people to sell organs? If it is a medical worry or a problem with people getting ripped off, a national regulatory body (there is already an organization that regulates organ donation), should solve those problems.
For the same reason tribes living near the edge of starvation have especially strong cannibalism taboos.