New Delhi, Dec 25 (ANI): Kelly Ripa has revealed that she fundamentally believes that sex is the key to long lasting marriage. She said that the "more you do it, the more you do it, the less you do it, the less you do it", a leading daily reported. She added that her husband and she just like each other a lot and they have been together a really long time and try to do spicy things together all the time.