One day a blonde, brunette and redhead walk into the elevator of their apartment building. As they enter they see a white puddle on the floor. The brunette bends down looks at it and says, “Ya that's the white stuff!”

Then the redhead bends down, smells it and says, “Oh ya that's it alright!”

Then the blonde bends down, taste it and says, “Sure it is! But it's no one from our building!”