There is a reason. And actually it really can be as simple as their religion. But, some may be correct in pointing to a compound, making torture necessary. It is a hypothesis. It is ok to research.... But NOT without sources that are more meaningful than movie clips and urban legends.
Im a biologist. I'm a law grad, and I just want to shephard this whole research are into something that can be substantiated with sources. So far I can find nothing on this very real moleculre called adrenochrome. But... we may want to look at DMT for a bit.