A kiss is a sign of affection. We give kisses to family, friends and even pets. Parents affectionately kiss their children, siblings kiss upon greeting and other relatives regularly receive an expected kiss upon greeting. Kissing out of admiration and non-romantic love often travels outside of family members and may include close friends. If we see technically, kissing takes a bit of coordination with your partner, but a passionate kiss lets you exchange some of the greatest pheromones, triggering a natural response from your mate. Frequent kissing in committed couples has been found to reduce stress and cholesterol while increasing a more satisfying relationship. Just take a look below at some really amazing facts about kiss.