Ever heard the line, “Show me a beautiful woman, and I’ll show you a guy who’s tired of f-cking her”?

Well, it’s kinda true: According to a sex survey of 3,000 25-to 41-year-olds, the height of passion lasts just a year into a new relationship, then settles into boredom, Ludwig Maximilian University reports.

Biggest reason for the decline? Arguing…so don’t!

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