Not really aimed at anyone op, just a fair few comments being a bit flippant.
Milk from cows also has a hormone in it Casomorphins, I believe, which is addictive and keeps a baby cow close to it's mother for survival purposes. I believe it is like a love hormone. Humans also produce a similar hormone in breast milk but at nowhere near the quantities cow's do (which makes sense really, as cows are huge and their ancestors would be more at risk from predators than ours.
It's basically like a drug which explains why it's really, really hard to give up milk and cheese because it's an actual addiction.
No point really, just blew my mind when I found this out as it made so much sense to me as I was a.proper cheese addict.