For: the sexiest thing is trust
There's something very sexy about Yamamoto, but no one's knows what really is.
That's why everyone is so fucking annoying happy to be near him.
Yamamoto is the air of trust.
You can trust him with friendship. He will do everything for you.
You can trust him, with his career, either as a hitman or in baseball. He can do everything perfect.
Normally, Gokudera can't trust anyone. He has Tsuna's friendship, he knows he is capable, and he is caring. so Gokudera tries to protect him, because he is his right arm. But in return, Gokudera, until sometime ago, doesn't trust anyone to protect him.
But now, he trust.
He trusts the baseball freak, with his life. And he can't think what is so more, so fucking attractive, or sexy more than the large back in his vision, swing the katana in the air, the blade stained with blood, fresh blood.
Yamamoto, until sometime ago, didn't kill. couldn't kill. Usually, he even avoid the killing, but for him, for Gokudera, he kills with so much fury, with those large golden eyes full of intent and goal. That makes Gokudera stop every thought that he has in his mind at the time, and think, that the sexiest thing that he ever seen on earth, is trust.