Quote from Robin in Symphony of Illumination
Robin: Barney, why are you so happy about this?
Barney: Because this is perfect. I want to be a dad.
Robin: This is not good news. I have a boyfriend.
Barney: Yeah, but if Kevin weren't around...
Robin: It doesn't matter! I don't want kids. I've never wanted kids, and never, in a million years, will I ever want kids.
Future Robin: Sorry, kids.
Robin: I can't have a baby.