I think that PDA as a cover for other nonsense should be a garashir trope. We know Julian understands this concept because he uses kissing the colonel in his holosuite program as a cover to get to her explosive earrings. I think Julian should pass Garak a data chip by kissing Garak with tongue in public and Garak should be annoyed that it works because its like the holosuite thing and that he found it arousing