A method and an apparatus for delivering a solution to a region of a human body, and washing, cleaning, and drying the region are provided. The apparatus includes a toilet seat assembly, and a spraying nozzle assembly. The spraying nozzle assembly includes one or more spray nozzle units having one or more spray nozzle bodies that are retractable and adapted to deliver the solution, a first driving motor being connected to the one or more spray nozzle units and adapted for moving the one or more spray nozzle bodies in retracting-and-extending motion, and a second driving motor being connected to the one or more spray nozzle unit and adapted for moving the one or more spray nozzle units in three-dimensional circular rotational motion. The one or more spray nozzle units may further include one or more nozzle jet head openings.