Please answer everybody's important questions about relationships?

I love my wife, but I don't think it is necessary to not have sex anymore. I think, yes we may not be having babies, but I think it is a common thing for adults to do to show affection to each other. Do you think I should talk to her about the problem, if so what should I say. But if she gives me a valid reason to I just accept or keep arguing, I don't know what to do please help!

Please answer everybody's important questions about relationships?
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