He's seen her underwear many times now. This should not be anything major. Big, maybe, but not major.
"It's fine if you look and stuff."
"...and stuff"? What stuff?
No, you won't catch a cold if you sleep at the kotatsu. That's just what parents tell children so they don't do it.
As always, thinking about the muscles.
Can't go too far with the vore fetish.
She's got a proper sports head. Well, the manga type.
What's with the enigma part?
Uncertain translation?
Is it “pulling the hair of the girl you like” but it’s a big girl hurting a small guy? Is that the joke?
It's the old school, "MC can get into perverted situations if he's punished for it, even if it's not his fault," ideas. The kind of thinking that people were tired up back when Love Hina was new. Incidentally, that MC is also indestructible as long as the plot requires it.