Why on earth did I find that so intriguing and attractive?
I love disaster movies and Dante's Peak is one of my favorites. There is a segment in the hospital and Pierce Brosnan is trying to get his team on board that something disastrous is looming. He then tells the story of Frog Soup. If you put a frog in boiling water it will jump out. If you put a frog in cold water and slowly turn up the heat it will stay in the water until it boils to death.
This is what happens to us. If we got the full force of their nature we'd run for the hills. What happens is we are lured in, bit by bit. By the time we see the man underneath the mask we are too involved to let go. We start doubting our own sanity and reason.