For the first four and a half months of his life, that I am aware of, Isaiah never had a binky. I brought one to Ethiopia just in case I thought we needed it. When I offered it to Isaiah, he could have cared less. Until our flight home. On the Addis to London leg, for some reason Isaiah decided his binky was his best friend. Since then, the binky has been a regular at nap times and bed time.
Here is a picture I just took, moments after Isaiah woke up crying from his morning nap. Clearly he was distressed to have lost his binky, and is now holding on to it for dear life!