I probably should, huh? [He felt oddly safe with his brother around for the first time in... in he was having trouble remembering. Vash actually felt like he could fall asleep even with Knives still around.

Except there was one big important thing that was bothering him.] There must be something you can think of that makes you smile. Or something you enjoy doing. Isn't there? [If Knives really can't think of anything to answer him with Vash is going to feel horribly sad for his twin.]