Milks pretty cheap around here and puss or not, it tastes good and is generally just as safe and sanitary as soda with the caveat milk isn't so nice to you if not kept in the fridge. With that said, asking if an adult drinking milk is normal, that's like asking if drinking tea or coffee is normal. There's no stigma to it; some people just don't like it while others love it. Personally, a tall glass of cold milk chugged in two seconds first thing in the morning has never failed to put me in a good mood.

