Disclaimer: Of course, I don't own Prince of Tennis. I know; I'm sad, too.
Kawamura would be the first to admit that his boyfriend had weird taste.
After all, who else but Fuji had such a fondness for cactuses? He had a vast collection of them, and had even given them all names. Kawamura often thought he could hear Fuji murmuring to them, too, but whenever he looked, the other boy was staring at him with a serene smile on his face.
There was also his appearance. Fuji was rather short and thin, compared to the other third-years, and coupled with his long hair, it was no wonder the boy got mistaken for a girl all the time. His clothes had a definite feminine quality, too, which made Kawamura think that Fuji meant to make this impression, except that he got angry every time someone called him a girl.
His liking for Inui's strange and often dangerous juices was also a little worrying. While any other sane person ran screaming when Inui offered his latest drink, Fuji would gulp it down like he was dying of thirst. He enjoyed them so much that he'd deliberately lose whatever challenge the team was doing so he could drink them.
He couldn't complain about his boyfriend's taste, however, when Fuji was pressed against him, the lithe boy's tongue roaming his mouth, and all he could taste was sushi, wasabi, and something vaguely like cinnamon.
Fuji had odd taste sometimes, but Kawamura really didn't mind.