The oil was contained in a little alabaster box and when the time was right she opened it and poured out all its contents onto His head. As the oil began to work its way down His body some of course would have penetrated His garments as the aroma filled the house where they were.
As it finally reached His feet Mary was there waiting to wipe them with her hair and kiss them tenderly, much to the disdain of some who were present at the time who thought her actions were a waste of resources.
It has been suggested that the fragrance would have still been on His person while suffering on the cross! While He refused the wine mingled with gall that was offered to Him, (to help relieve some of the pain He was enduring) He could still smell the beautiful fragrance of Mary's offering she gave so lovingly to Him just six days before.