It is not unheard of to, now and then, come across a Slytherin sitting, seemingly oblivious to the three or more Hufflepuffs using them as a pillow or post. This is a combination of Hufflepuff and Slytherin house dynamics: a Slytherins tendency to get lost in their thoughts and Hufflepuffs being golden retrievers in human form.
Parvati positively beamed. Harry could tell that she was feeling guilty for having laughed at Hermione in Transfiguration. He looked around and saw that Hermione was beaming back, if possible even more brightly. Girls were very strange sometimes.
“Hi, Parvati!” said Hermione, ignoring Ron and Lavender completely. “Are you going to Slughorn’s party tonight?”
“No invite,” said Parvati gloomily. “I’d love to go, though, it sounds like it’s going to be really good… You’re going, aren’t you?”
“Yes, I’m meeting Cormac at eight, and we’re—”
There was a noise like a plunger being withdrawn from a blocked sink, and Ron surfaced. Hermione acted as though she had not seen or heard anything.
“—we’re going up to the party together.”
“Cormac?” said Parvati. “Cormac McLaggen, you mean?”
“That’s right,” said Hermione sweetly. “The one who almost,” she put a great deal of emphasis on the word, “became Gryffindor Keeper.”
“Are you going out with him, then?” asked Parvati, wide-eyed.
“Oh—yes—didn’t you know?” said Harmione, with a most un-Hermione-ish giggle.
“No!” said Parvati, looking positively agog at this piece of gossip. “Wow, you like your Quidditch players, don’t you? First Krum, then McLaggen.”
“I like really good Quidditch players,” Hermione corrected her, still smiling. “Well, see you… Got to go and get ready for the party…”
She left. At once Lavender and Parvati put their heads together to discuss this new development, with everything they had ever heard about McLaggen, and all they had ever guessed about Hermione. Ron looked strangely blank and said nothing. Harry was left to ponder in silence the depths to which girls would sink to get revenge.