Quote from Barney in Bad News
Ted: Wow, we finally found Barney's doppelganger. I guess we can tell you now, Lily. That hot dog guy did not look like Barney. Lily: Uh, Marshall? Marshall: Yes, I know, we made our little deal with the universe, but... Lily: No, we've made a binding covenant with the universe. We said we weren't going to try to have kids until we saw Barney's doppelganger. Oh, this is bad news. This is like a black cat walked through my uterus. Okay, that's it. I am going back to Dr. Stangel and getting thoroughly checked out. Barney: Or... Or cost-saving alternative: you could get checked out by someone who looks just like him. I'm gonna go scrub up. I'll meet you in stall three.