Before you met Madden you were a regular tits-and-ass guy, just like every other dude in the world. Panties were fine, they were sexy, but they were just another step between you and pussy.
But Madden wore her panties so stylishly, so sexily, that it changed you. You slowly became a panty guy. You slowly started admiring her panties when she stripped for you, instead of wishing for her to drop them immediately. You left them on her during foreplay. You rubbed them, and rubbed her through them. You began to see the sexy panties as an extension of her own sexiness.