The cast of How I Met Your Mother is doing a lot of reminiscing leading up to Monday’s series finale. Some of it involves tears, but there is plenty of laughter, too. On Inside the Actors Studio, however, reflecting on nine seasons of sitcom magic includes talking about what turns Barney on — and it might not be what you expect.

Josh Radnor, Jason Segel, Cobie Smulders, Neil Patrick Harris, and Alyson Hannigan sat down with host James Lipton on Thursday’s episode, and per usual, the conversation started with the Bernard Pivot Questionnaire. The cast members answered as themselves, as well as in character. From the word that makes Radnor absolutely cringe to Barney’s legendary answer to that most amorous question, find out what the crew had to say in this video:

The How I Met Your Mother series finale airs Monday at 8 p.m. ET on CBS.

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