Why do women stop being attractive after 40?

Don't get mad. I'm trying to understand the psychology behind it. This number is not set in stone. Some women look kind of gross by 30. Some are able to put it off till 50. But in general women stop being attractive by about 40. Why is this? They're still the same person. They still wear makeup. They still exercise. Why does it end at this age?

Why do women stop being attractive after 40?
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