Why do we swich from human milk to cows milk?

cause we got weened off our mom .. cows have more milk

Because fathers milk tastes funny

Cause your mama doesnt wanna drag around a 13 year old on her tit

cheaper. less fatting. buy it by the gallon.

Because females only produce milk after they've been preggers. Cows are artificially inseminated in order to get preggers and produce milk.

we are the only mammal on the planet that drinks milk after infancy ...well, maybe not

Efficiency. After you're five, you're bigger and so is the cow!
I have a quart of cold cow cream! It's almost time to start using it up!

Because so many silly women get angry if you ask to suck on their nipples when they're lactating?

Mass production

@itsok

Because no one actually thought about it really. It's just accepted