After he's good and clean, give him something to read and leave the room. Put a towel in the dryer and return to him. Ask him if he needs a cold drink. Tell him to inform you when he is finished and not to get out of the tub until then. When he's done, remove the towel from the dryer and finish what you started.
Details are very important i.e. perfect water temperature, cold drink, warm towel etc.
Make a list of reasons why you love him. Use detail and reference wonderful memories of the two of you together. After you have created 10-15 little notes, put them in his car, in his jacket or pants pockets, under his pillow etc. Make sure he finds little notes from you for several days. Once he finds two or three, he'll start looking for more.