Terezi & Mason
That was because it wasn't on Earth. It wasn't even in the same universe. She knew because her universe was destroyed quite awhile ago now.
It was a good thing he added the 'kind of cool' bit. If he'd just left it at weird, she might've put some snow down his pants. "Of course everything has a smell," she told him. "You mean like if there's a bunch of colors mixed together?"