I mean, if by reason you mean causation and not purpose, sure. But I think being that reductionist is pretty boring and unuseful. Not to mention that you can s

I mean, if by reason you mean causation and not purpose, sure. But I think being that reductionist is pretty boring and unuseful. Not to mention that you can still reproduce without a foreskin, but if you were just a disembodied but otherwise intact dick-and-balls; I doubt your reproductive chances would be particularly high. So from an evolutionary standpoint, I would still argue that it isn't the most important organ.