User blog comment:FairyRaven/Fairy Tail Chapter 404: 00:00, Review and Commentary/@comment-3987368-20141011104106/@comment-4800978-20141011144601

Mashima already gave us the 'serious' reason through Erza last week with her 'light of her friends' comment. This week was just Happy's interpretation of things, which contributes to the running gag of 'Erza is bat-shit crazy sometimes', and the other Exceed clearly think it's bullshit. And Raven, at least my interpretation of his comment, was just mocking the situation. "Don't try to find a logical explanation because you'll not find shit."