Troi had sensed his erotic thoughts about her, although she noted his limited imagination.
His son and Deanna Troi were genetically bonded when they were children as required by Betazoid custom. His wife and Lwaxana argued over the wedding arrangements, especially the Betazed tradition of the wedding party being naked. He did not have any objections to this, and agreed to be naked along with Lwaxana during the ceremony. (TNG: "Haven")