Looks like it does because Papyrus is just extremely dedicated to a pun. If you call Papyrus in front of the station he’ll inform you that his station is built out of cardboard, using rotini noodles as screws. And that his station is made of “cardboardhydrates”. What if, he built it out of such poor building material just because he was so dedicated to the pun.
Sans? He throws around puns all the time, no grace, no setup, so forced. Sans is all about the opportunistic moment for a pun. Papyrus? He will make something, and wait. Wait for months even, for someone to ask about it so he can finally unleash his pun. Papyrus is all about the build-up and payoff.