Sneak a peek at his current stash. If most of Dad's bottles lean citrusy or aquatic, steer similarly. A collection of warm spices? Then 1 Million or Euphoria will feel familiar yet fresh.

Mind the setting. Does he clock in long hours at a desk or spend weekends coaching soccer? Lighter colognes like Cool Water or Chrome Legend withstand heat and constant movement.

Longevity counts. If he forgets midday touch-ups, choose fragrances known for staying power—Legend, Cognac Haze, and Explorer Ultra Blue excel here.

Ask Mom. She is historically the CEO of household feedback. Enough said.

Trust your nose. If a spritz makes you smile and picture Dad rocking it, chances are you have found the winner.