1 The Harley St clinic study found women spend 474 days of their lives putting on cosmetics. 2  Translates as three hours, 19 minutes each week in front of the mirror. 3  Eye make-up takes the longest, with average woman spending 17 minutes on area before a night out.hat's a LOT of slap! 1  The Harley St clinic study found women spend 474 days of their lives putting on cosmetics. 2  Translates as three hours, 19 minutes each week in front of the mirror. 3  Eye make-up takes the longest, with average woman spending 17 minutes on area before a night out.