Is it permissible for an unmarried man to commit zina (fornication/adultery) if he fears al-anat (severe hardship/ruin due to celibacy), or an inability to have marital relations and thus wrong his wife?

A Muslim is never permitted to commit zina (fornication/adultery), due to its destructive impact on society and morals, and the great corruption it entails. The fear of 'anat (hardship/irresistible urge) mentioned in the question is from the whispers of Satan, aiming to corrupt a person and distance them from God. A Muslim should proceed with marriage without hesitation, unless doctors confirm their complete inability to engage in marital relations. In such a case, their path is fasting and engaging in acts of worship.