This issue about whether these headphones will stay in the ear is something I thought about from the beginning. Not to mention how they look just like my electric toothbrush brush head sticking in the ear! This is pretty typical of Apple to remove the normal headphone jack and making it your responsibility to find a solution or buy their very expensive bluetooth headphones (I won't call these earbuds as they are too big to be considered ear buds).
http://www.macrumors.com/2016/09/08/airpods-impressions-game-changer/?utm_source=feedly&utm_medium=webfeeds