Find the perfect couples costume for Halloween with these ideas.are the frightful night with your significant other in style with these cute couples costumes for Halloween. Need a couples Halloween costume idea for that important Halloween party or event? Stumped as to which couples costume is right for you and your partner? There’s a lot you can do – you can be a famous couple, a fictional couple or even a “Perfect Pair” – you know, things that go together, like burgers and fries, for instance – the number of creative choices available is only limited by your imagination.