As explained by some, aging slows down your metabolism. Some people experience drastic changes.
I do think we need to update our definitions of what is a romantic hero. People of all ages and body types should be capable and accepted as playing romantic leads. Although, I must say men in the industry get away with it easily. There's been plenty of aging and obese men playing romantic leads - but women get discarded as soon as they hit a certain age mark.
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