Aaah yess ,the milk....
My grandmother used to tell me stories about back when she was a kid.....her grandmother ,as most of the elders, used to boil hemp seeds with milk and give some to the children to drink ,so they can sleep better......
As you say ,it's all about the quantity....I doubt the seeds themselves were having any effect .....rather the amount of seeds "
having kept their calyxes stuck onto them" that would induce tranquility in the little rascals....
Of course we tried milk ,....once.......started boiling about 2 liters in a pot packed with leaf and bud matter............give or take a male or two

.....whadaya want ....we were "inexperienced"...
Of course the milk overboiled while we were busy rolling and testing some plants........got the kitchen full of milk and weed leaves.....
All that remained was about a cofee cup for each ,there were 3 of us..........but man....talk about trance.......
Don't mess with milk ,kids....