According to the Berkeley Science Review we should do it. The trick, according to the article, is that having fun and doing new and novel things as a couple staves off boredom, which, according to experts, is a relationship killer. It also serves a second purpose of connecting positive, exciting feelings to your spouse because you did the activity with them reinforcing positive feelings of love and excitement within your marriage.
Finally, these fun and exciting things don't have to be skydiving or bungee jumping. It could be as simple as spending time getting to know another couple. The key is to do the activity together and have fun. If Scrabble does it for you then by all means spell away!
I would love to hear about the fun and exciting things that you and your spouse do. Have you ever gone skydiving? Can you recommend a good place?