Leonard: It made me really happy. We haven't always had the easiest relationship. But, well, looking back, I guess you were just trying to push me to be the best version of myself.
Beverly Hofstadter: So you would say that my parenting strategies, although difficult at times, directly contributed to your current success?
Penny: Well, I may have had a little something to do with it. I mean, how often do you wear your superhero underwear now?
Leonard: Only Fridays and my birthday.
Penny: Yeah, that was all me. That was me.