Two junior co-eds went to the movies one night. After 15 minutes passed one girl leaned over and whispered to her friend, "What should I do? The guy sitting next to me is masturbating."
Her friend replied, "Don't do anything. Just ignore it."
The first girl said, "I can't."
Her friend, "Why can't you ignore it?"
The first one says, "Because he's using my hand!"