But Actually ...
According to nutritionists, food science researchers, and people who aren't your grandparents, turkey and warm milk are not sedatives. It's true that turkey has tryptophan (an amino acid that eventually becomes serotonin and melatonin, neurochemicals which do play a role in getting your brain to fall asleep). However, turkey doesn't contain enough tryptophan to have any noticeable effect on your state of consciousness. In fact, it has exactly as much tryptophan as plenty of other dairy, nut, and meat products do (cheddar cheese has more).
The main reason you pass out on the couch after the last round of pumpkin pie is the fact that you ate (on average) 4,500 calories, like a goddamned marauding Visigoth. You're passing out because your body is working overtime struggling to digest all the meat and bread you crammed into it like spackle in busted drywall.
"Throw ... chunks ... in my mouth ... between ... snores ..."
And when it comes to drinking that warm glass of milk, there are no natural sedatives at play either. It's simply very soothing to slowly drink a warm liquid ... particularly since you drank the stuff in your first several months of life. You're just pining for your pre-solid-food days, producing a completely psychosomatic reaction. Would it work even better if you had a giant person feeding it to you while you wore a diaper? Only one way to find out!
"It's $20 extra if you want it from a baby bottle."