Mark Leyner said this quote
“ I tend to interpret that whole 'everyone's wife is a Mossad agent' thing in a more sort of metaphorical way--that people you're intimate with might be, like, 'double agents,' y'know? It's a weird kind of paranoia you get about people you love--that they might turn out to be completely different from who you think they are, that it's all been some sort of diabolically patient plot against you. I think that's a pretty normal fear you have in any serious relationship. And that's why it's such a popular part of the epic, because so many people can relate to that fear. But personally, I don't really worry about it too much. ”