Is milk straight from the nipple sour?

Question

I went to El Salvador and the milk I bought over there was sour, I asked if it was expired and the guy told me that it came straight from the nipple. So, what is it, does the US put in some chemical in it?

Answer 1

wait what nipple a cow, goat or human??????

Answer 2

boy did you get suckered!!!!!!!!!!!!

woof

Answer 3

Not sour, but it is warm and thick.