When Barney witnesses Marshall performing a chore in the house, he thinks Marshall and Lily are headed towards divorce. To save his friend from this fate, Barney offers Marshall relationship advice that Ted strongly thinks should be ignored. At the same time, Robin and Barney are flaunting their happy relationship around the crew –- kissing and using pet names constantly. Ted suspects that something is up with the couple and that they are not as perfect as they seem to be. When Barney's advice blows up in Marshall's face, Barney claims even more that he and Robin have the ideal relationship and never fight. However, Ted soon reveals that Robin and Barney have been arguing non-stop when alone. Robin and Barney fess-up to their less-than-perfect relationship and seek advice from Lily and Marshall.