Marshall: And so, now, I'm just scared that we won't be able to give you a grandchild.
Marvin Sr.: Aw, Marshall. We don't care about that one bit. And if you guys want kids, there are other ways. Adoption. Maybe you have a good friend who could loan you some sperm?
[Marshall thinks about Ted and Barney]
Marshall: Maybe adoption.
Marvin Sr.: What I'm saying is, we love you no matter what. Now, why don't you pretend you're in high school, get back in that bathroom, and "blow dry your hair".
Marshall: Wait, you knew?
Judy: We didn't have a hair dryer, dear.