Seeing that this conversation could lead to something bigger, the girls paid more attention to it and realized that even though Jack was a minor character in the show, the producers had also taken care to give him a backstory and depth that characters like him didn't usually get.
It was great because it made him seem more like a real person than just a pretty face who would appear in one episode and never come back.
"Then let's go fishing together! I'll teach you how to fish! We'll stay in the boat and watch the bobbers in the pond go up, down, up, down, up, down..." Steve said laughing as he put his hand on Jack's shoulder and looked at him excitedly.
As soon as Steve said this, the camera showed the reaction of the other characters and the girls couldn't control themselves and started to laugh.