Should you be one with a propensity for jamming your hands in the jacket pockets, leave the basting stitches in and the pockets sewn shut...it's a great way to break a bad habit, and keep your jacket pockets looking pristene.
That's one way of looking at it.
Then there's this, recommended to no one but me. Each fall I go to $Tree for four Gatorades, the ones shaped like this...
...dump the stuff out, fill with well water and just before beddy-bye, stick them in the microwave, put on a tweed, shove a bottle in each pocket and trudge upstairs to prewarm the bed where this winter, bedside, it went down to 24°, but usually around 34°. When time to turn in, pocket the other two and up I go. The Harris goes in too because a freezing one's too much of a morning wake up. Would be lost without usable jacket pockets. Cuff buttons, neck ties, lapel hole, bottom button, all for looks. Hip pockets, where the action is.