Here's Katy talking about her recent ex-boyfriend Travis McCoy of Gym Class Heroes...

"Girls, if you have ever dated a boy - specifically the lead singer from Gym Class Heroes - don't do it! Boys should have a heart. You know what I mean girls? Boys just want the milk, but they don't want to buy the cow."

 

Is she calling herself a cow?

 

Also, we know a lot of boys who buy milk but not many (none in fact) who own a cow.