Disclaimer: you know Yu-Gi-Oh's not mine because I can't write straight people. at all.
He says he hates cigarettes. Says that they're disgusting and he hates the smell of them.
That's not the truth though. The truth is quite different. The truth is that they remind him. Remind him of the one who died. Remind him of the one who died. Remind him of the one that is gone. The one that is never coming back. If he were to tell the truth, he'd tell you of a 17 year old boy who died in a fight over a pack of cigarettes. He'd tell you of a 15 year old boy who screamed and raged and cried for weeks after that fight. If he'd tell the truth, he'd say that it isn't the cigarettes he hates but the hurt they bring. He'd say he hates remembering.
He won't tell the truth though.
After all, it's always easier to be angry than hurt.