Bernadette: So Leonard's really considering this?
Penny: Yes. We got in a huge fight about it. He said, well, if I don't want to have his baby, then why shouldn't someone else be able to? Do you believe that? What?
Bernadette: Well, there is a deep-seated biological drive to pass on your genes. It's only natural.
Penny: So you're on his side?
Amy: Well, viewing Leonard as a mammal, it's perfectly understandable.
Bernadette: But viewing him as your husband, he stinks.
Amy: And we hate him.