Nose Goes

After reading a couple books about personal enlightenment and human evolution I got to thinking...

As a human being you get at least one cold a year, right? And while you have this cold you are usually blowing you nose a countless number of times throughout the day. So, why is it that your nose always gets red and sensitive making it painful to wipe your nose? Especially me, who also has allergies that make my nose run all the time. Why haven't our bodies adapted?

Another part of the human body that hadn't evolved is the tongue. I burn my tongue all the time and yet it never seems to get any tougher. Why is that?