He was making a statement, okay? The smell of menthol following him everywhere would be almost worse because he wouldn't be able to smell anything else over it.

"Ha, isn't that one of those 'pot calling the kettle black' things? Except you aren't tall, I guess, so there's that!" Sometimes he thought about sitting on Gokudera to make him eat more, but that was probably his dad's lessons about food being love talking.