Mechanically gastrointestinal motility (peristalsis) increases in the intestines.
One of the branches of the vagus extends through the gastrointestinal tract controlling the secretion of insulin and glucose, hormones that are involved in the absorption of nutrients.
see about vagus nerve in
https://es.wikipedia.org/wiki/Nervio_vago
Massage improves nutrition and optimizes the digestion process.
Coffee after meals improves digestion see
https://www.livestrong.com/article/440826-is-oatmeal-good-for-digestion/