As Papyrus gave Frisk a piggyback ride around town, he admitted that he wasn't quite sure what to do at first so he asked Lora for help. The dragon had explained that Frisk was far too young to go on a real date and suggested a play date instead.
Frisk asked if Papyrus knew what a play date was, because they didn't. The cheerful skeleton replied that he had asked Lora the exact same question and proceeded to do an unintentionally funny impression of the luck dragon as he recited her explanation.
"A play date is when young individuals are brought together for the purpose of social interaction and fun."
Papyrus then asked Frisk what they wanted to do 'for fun'. The human had a few ideas, they still wanted to go to the library and they had spotted some kind of restaurant during their prior exploration of Stonedin but they also wanted to learn more about Papyrus. They weren't sure what to pick and worried they would choose something their friend didn't like, they asked Papyrus what he wanted to do.
He replied that he would take part in whatever activity Frisk wanted to do. Frisk just blinked at him and decided to not look a gift skeleton in the mouth. They decided to make it a play date of fun by reading at the library, then they both grab a meal at the restaurant and Frisk would spend the night having a sleepover with Papyrus.
* The idea of having so much fun with The Great Papyrus fills you with DETERMINATION.
As much fun as Frisk had with them, I think Frisk would be over the moon when they see the Dog Brigade in Grillby's. And since they're not going on an actual date, Papyrus never got the "official dating rulebook" from the library, meaning Frisk could find it and its meta-jokes.
7640584 well Frisk could end up finding a bunch of Diamond Dogs on a break at Ponytales equivalent of Grillby's...
* Considering dating sims are one of the author's favourite genres of games, the idea of Frisk finding a guide to one is to good to pass up.
I prefer visual novels of the romance genre but eh, it'll still be fun. Dunno how Frisk will interprer it though.
7640644 Well, Chara, what's your favorite game genre?
7640713
* Text adventures, those were the only kind of games mom had on her computer when I was living on the surface and not much of the technology The Seven Sages gathered before sealing themselves underground wasn't put towards leisure activities until after I died, they just didn't have the resources.
7640868 Fair enough. At least now you can branch out, well if you can hold the controller. The Chara in Ask Frisk and Company can, anyway. Can you hold physical objects?
7640875
* I haven't tried...I don't have the determination to manifest as anything other than a voice for the time being.
7640887 Well, just stay determined, and you'll get there. And when you do, I recommend the Legend of Zelda series.