Have you ever seen how flies can creep on wall, glass, ceiling and etc. And your question was - How they could do that, and why you can't do this!
Well, I have an idea! How do you think about special boots and gloves, which will have a billion of micro suckers, which could bear your weight.
Just imagine, you climb up skyscraper without any safety net and many people are amazing. And with this equipment you could be FAMOUS!!!