My Current Why List

Why is it in cartoons that the animals all walk on their back legs and don't wear pants (or at the most, wear a short, ill-fitting tshirt), but then all go to bed in flannel pajamas?

Why does the postal service (in every country that I've ever mailed something to or received something from anyway) always lie about when a package will be delivered? Filthy liars, they're always late.

Why is it that when I paint my nails the polish never seems to fully harden, and I wake up with sheet creases in it no matter how many hours before bed I paint my nails?

Why do Ice Ice Baby and Bust a Move put me in a super happy, dancey-dance mood no matter what is going on or where I am?

Why, when I've always hated running, do I love it so much now? The burn in my legs and my lungs are things I look forward to now.

Why do I always decide the house needs to be clean at 10 o'clock at night?

When I get groceries, why do I almost always forget the one thing I really needed in the first place?