The invention features a method of administering a
skin benefit agent to an expanse of
skin, wherein the method includes: (a) contacting the expanse of
skin with an apparatus, the apparatus including: (i) a skin-contactable element having a skin-contactable surface; (ii) a motor; and (iii) a transfer member for transferring
mechanical energy from the motor to the skin-contactable element in order to provide periodic motion to the skin-contactable surface; and (b) after contacting the expanse of skin with the apparatus has ceased, further contacting the expanse of skin with a benefit agent, wherein the benefit agent is selected from the group consisting of retinoids,
copper moieties, skin-firming agents,
depigmentation agents, and combinations thereof.