This one-shoulder black dress has a sexy cleavage-bearing top and a headdress crowning your head with snakes. Roman and Greek God Costumes It's the guys' turn! Of course, that means their rich history is ripe with great ideas for Goddess costume roman adult outfits. Hey, 2 out of 3 isn't too bad, right? Let's take a look at some of the many options you have when choosing a Roman or Greek couple theme.