for men to wear, when the merchant is certain that the purchaser will in fact wear them?

Answer: Selling gold rings to men when the seller knows—or has strong reason to believe—that the buyer will wear them is unlawful. Gold has been forbidden to the males of this Ummah; therefore, if a person sells it to someone whom he knows, or is reasonably sure, will wear it, he is helping him commit sin. Allah has prohibited cooperation in sin and transgression, saying: “And cooperate in righteousness and piety, but do not cooperate in sin and aggression” (al-Ma’idah 2). It is likewise impermissible for a goldsmith to craft gold rings for the purpose of men wearing them.

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Question Twenty-Two: What is the underlying reason for the prohibition of men wearing gold? We know that Islam forbids its followers only from whatever is harmful to them, so what is the harm