Final answer:
Kissing triggers neural responses that lead to heightened emotional bonding, digestion, and mood modulation.
Step-by-step explanation:
The release of chemicals triggered by kissing leads to heightened emotional bonding. This is because neural responses facilitate the secretion of hormones and enzymes needed for digestion and also contribute to peristalsis, the movement of food through the digestive tract. Additionally, kissing can modulate mood and reduce anxiety and tension.