They do not know what you know, so you have to tell them.
At the risk of repeating myself, you have to get used to starting from the beginning.
Every time you interact with someone new, they often do not have any history with you or your ideas so it is important to start from zero and gently take them through.
Yes, you have said it a thousand times but they are hearing it for the first time, so keep it fresh and keep up the enthusiasm.
