If men are visual creatures, how is it possible for him to still love his aging wife?

My grandparents for instance is an example of old-fashioned love. Grandma is only 3 months older than him. When they met, she was 18 and he was still 17.

Now they're both now 68 year-olds and still together. To him, she's still his beautiful wife. Obviously both have aged and she's obviously lost not young nor fertile anymore.

If men are visual creatures and find us the most attractive between 18-24 years old, how can a man still find his aging wife beautiful? Can he still be attracted to his elder wife?

If men are visual creatures, how is it possible for him to still love his aging wife?
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