Age is not typically a determining factor in the Islamic ruling on men's ear-piercing. The permissibility or prohibition of ear-piercing is based on the act itself and the intentions behind it, rather than the age of the individual. However, it is worth noting that younger individuals may require guidance from parents or guardians, taking into consideration their cultural and religious values, before making a decision. Consulting with knowledgeable scholars can provide further clarity and guidance specific to different age groups.