He grinned as Pansy reached out to him, and said, "They'll be specially charmed to attach somehow to clothing. Maybe something similar to Muggle velcro, or some other adhesive. And they'll come off when a donation is made, or a kiss is given," he said.
He smiled, and glanced towards Cass to see if he thought, but the wizard was merely watching and smiling. "Thank you," he said, blushing a little. "Was there anything else you wanted?"