This recent Paul McCartney music video of his song “My Valentine” features actors Natalie Portman and Johnny Depp using American Sign Language (ASL). [youtube http://www.youtube.com/watch?v=f4dzzv81X9w&version=3&hl=en_US&rel=0] Did Depp and Portman sign the word ‘tampon’ by mistake in this video? The answer has to do with the use of classifiers within the context…