Do men prefer "average" looking women because they think they are easier to please?

If given the choice.. Do men typically choose the "average" looking woman over the beautiful one to be with long term? If so, is it because they think she might be easier to please in the long run? Or maybe the mans self esteem is too low to believe a beautiful woman would be loyal to him? What do you think?
Do men prefer "average" looking women because they think they are easier to please?
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