I only ever floss at home, in the morning after breakfast (if I eat breakfast) or after finishing my coffee and at night after dinner, so I don't feel like I need them scattered everywhere. If I put them all at home, they're taking up space and I'm not actively using them, so I feel like having 2 is enough at this point. I suppose I'm also less forgetful than you are: my dental floss has exactly one "home" so I always know where it is.