Many people try open relationships and it causes more problems than it solves. This could be due to a number of factors. Open marriages require 100% openness, honesty, and communication. This is hard for many couples but entirely necessary to maintain trust in an open relationship. Some people may find that sex outside the relationship leads them to bond more strongly with someone other than their spouse. This causes difficulty because it sets up competition. When this happens, a couple may wish to take a break from outside relationships and work to improve their marital bond.