Robin and Barney are now official but Barney has been having trouble adjusting from his bachelor ways. Off of Barney's actions, Robin begins to question whether or not he is capable of being in a relationship. Ted, upon hearing Robin's concerns, takes it upon himself to fill-in Barney. Barney is scared Robin will leave him so begins trying extra hard to be a good boyfriend - so hard that Robin thinks he may be up to something. When Robin begins snooping, she discovers that Barney has been taking a class all about Robin that is being taught by Ted. Robin crashes the class and lets Barney know that there is no simple course to learning about her, he must learn from experience.