blondie - part deux

A blonde goes to the movies, her boyfriend asks if she wants any thing to eat, she says yes M&Ms. So he goes to get her some M&Ms. He comes back with the M&Ms and gives them to her, she opens up the bag and pulls out all the brown ones and gives it to her boyfriend. Her boyfriend asked why she gave him all the brown ones, and she said "Oh I'm allergic to chocolate."