When you are relaxed, you are more likely to quickly chew your food thoroughly stimulate peristalsis develop constipation

When you are relaxed, you are more likely to chew your food thoroughly.

You aren't in a rush, you're relaxed. You have no reason to hurry. 
Being relaxed while you eat has perks - since you chew your food thoroughly, you can savor the flavors and have less of a choking hazard.

Hope this helps!