I don't know if it'll always matter. But the only serious relationship I've ever had, it just couldn't work out because she was so into her religion and I was so into not being into my religion. I've had less serious relationships where it didn't matter but.... that could easily be because it just never got to a stage where it did matter.
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The batman villians all seem to be one big joke that batman refuses to laugh at - SantaRPG