Quote from Barney in Twin Beds
Barney: All right, all right. As your ex, before you jump into anything, I need to meet this guy. I think it's kind of weird that I haven't met him yet.
Robin: Totally weird. It's almost like someone carefully orchestrated it that way on purpose. ... Fine. But you have to promise to be on your best behavior.
Barney: I promise.
[later, when Don joins Robin, Barney and Ted at MacLaren's:]
Barney: So, I'm banging this Portuguese contortionist and I swear, she is so flexible, at one point she was on top of me and underneath me. Up top and down low! One and two, bang!