Banging this drum again, as it has been a while and it does seem to be catching on. This iteration will be a comprehensive attempt at the theory but one which excludes any predictions, as the predictions have tended to overshadow everything else in the topic. If you're particularly sensitive to potential spoilers then this isn't the topic for you. How Valyrians were able to ride dragons is a secret, the text makes that clear. It is an in-world mystery green-lit by GRRM for speculatin