I'm not sure if anyone knows, but Venus isn't the only planet, along with Saturn, and Mars that we can see with the unaided eye. You can also see two others. Out of the eight, we can actually see, Mercury, of course Venus, Mars, Jupiter and Saturn. Oh, and Earth, of course is also visible to the unaided eye. Just look down.
When I look at Venus and Mars, I always have my "wondering" questions. It's just that something bad happened on Venus and Mars. Looking at Mars and Venus makes me wonder if whatever happened there, could it happen here? I wonder, because we (human beings) have such a huge impact on the environment here, without much regard to long term consequenses. I mean, who even knew to ask these questions of our own planet before the study of Venus and Mars, our nearest neighbors in space, forced us to look back on ourselves? I dunno, I just think it's something we need to really think about.