A blonde reads an article that states milk is great for your skin. So, planning to take a milk bath, she puts a note out for the milkman requesting 15 gallons. Milkman sees the note, figures she made a mistake and really wants 1.5 gallons, so he knocks on the door to clear things up.

"No", she says. "I really do want 15 gallons so that I can take a milk bath".

"Pasteurized ?" asks the milkman.