When you're single, it's pretty much a given that you have to keep spare toothbrushes on hand. You never know when a night with Mr. Wonderful will turn into an overnight. And if he's going to make out with you until the wee hours, he's probably going to want clean dentifrices.
The result of this is that you're left with an extra toothbrush in your bathroom, and every time you see that nylon-haired wonderwand, you're going to think of HIM. You'll smile, get all smooshy inside and maybe line up his bristles right next to your own.
But heaven forbid things don't work out between the two of you, and you're left with a plastic pariah that you want to flush down the toilet—or that serves as a painful reminder of euphoric nights past. Even if you relocate the toothbrush to your trashcan, you'll have to look at your single brush standing sadly alone in its holder.
It's a lose-lose situation. But I think I've come up with a solution.
By strategically placing HIS toothbrush somewhere else in your medicine cabinet, you'll be less likely to become conditioned to seeing it next to your own. So if things don't work out, you won't feel sad each time you reach for your solo brush. And hopefully, someday you'll be able to move it from the third shelf down into the designated cup with yours, and it'll stay there for a very long time...