More importantly, it helps them go to sleep easier, deeper, and longer.

Strip the kid down to their diaper, lose your shirt, lay back on the couch watching a movie or reading a book with a light blanket over both of you.

That pretty much describes my evening after dinner when my boys were under 6 months old. If you do it right after they eat it's pretty much a guaranteed 3-4 hours of peace even with a newborn.