To help out his friend, Ted gives Barney a lesson in Robin 101. Conveniently, Ted is a college professor, so he and Barney meet in his classroom where Ted spills the beans on everything, from Robin's surprising erogenous zones to a crucial list of five things never to do in front of Robin. Needless to say, Robin is not thrilled when she finds out about these lessons.
While watching the episode I couldn't help but think that the characters make the potentially awkward situation of dating your friend's ex seem pretty fun and easy. Have you ever had a lover in common with your friend?
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