Convince him to buy you more jewelry by masturbating him with a string of pearls. Get his penis hard, use lots of lubrication, and then wrap the pearls around the shaft of his penis, slowly stroking them up and down. The added feelings from the pearls will provide different levels of stimulation to the experience. Try alternating the speed, and rhythm.  And don’t forget to give some attention to his testicles too. They are often neglected.