Pornography should never be used as a tool to undermine what God has put together. Read Matt. 5: 28. I don't think you want to commit adultery and if you need strength read Ps51 and use this as your prayer.
At first , I used to think that it is ok once you are looking at it together to enhance the relationship. But now I am against it , because when you look at porn , you going to find ourselves wanting to venture out more. Like for example you might want to look at threesomes and the list goes on. I personally feel that no matter if two virgins get marry , they will know how to have a fulfilling sexual ralationship.Our body that God gives us is amazing, just use your total body together and will find out.