Jars
She didn't know when exactly it started but one morning when making a sandwich she came across a jam jar with finger indents in the top the jelly like substance.
Certainly the last 'incarnation' didn't have any such habits, no quirks to speak of. But then again, shrouded in his large black jacket he was very closed; tended to keep things hidden and trapped inside. So I wouldn't surprise her that if he did have 'quirks' he kept the hidden with his emotions and thoughts.
But this one, the new, new Doctor, was more open. He showed his quirks, and there were a lot of them; touching his hair, touching his ears, the glasses, hands in pockets, licking things and now with the jars.
But just because you can open a jar doesn't mean you get to taste what is in it.
It's not as if Rose wanted to make a sandwich of jam which the Doctor had dipped his fingers into.
Every jar.
Marmalade.
Jam.
Honey.
Chocolate spread.
Mustard.
Branston Pickle.
Salmon Paste.
You name it he'd had his fingers in it.
Sandwiches were pretty much out of the question.
But while the Doctor was a little more open this time, Rose wondered if he'd ever really let her in.