They probably have fantastic aerial sex, and buzz villages either just to show off or if one of the is feeling particularly exhibitionistic.
Bronze, of course, can do it underwater.
I think there was a story waaaay back when of how a group of adventurers were working a port city powerstruggle between a plain-nasty-evil slaver, an evil elven necromancer, and the ostensible captain of the city guard who happened to be a bronze dragon in the alternate form of a human. The PCs eventually managed to convince the necromancer and the Bronze to ally to get rid of the slaver, then convinced them to marry to stabalize the city; the necromancer thought she'd easily outlive a pitiful human, and the bronze figured he could keep the necromancer in check if he was her 'husband'. (Friends close, enemies closer, etc.)
Several years later, then end up coming back through the city and finding out that not only has it worked fantastically, but they're now actually legitimately in love with each other, and all upset because they're actually trying to conceive a child, but are failing. It all clicks into place while they're staying with this 'royal family', and assassins attack. One of the party members witnesses the necromancer turn into a blue dragon and fry some of the assassins. (Before reverting to her alternate form.)
They didn't want to interfere, but one of the party members really thought the bronze was a total BRO-nze, and that he ought to know. He wasn't happy to hear it, but he believed them, then went to confront Necromancer. (Wish I remembered their names. Then again, just being a story on /tg/, it might not have had any.)