Not a dopey question. Always stuff a bag when putting it in your pack.
Begin with the foot end first to trap less air when stuffing. Stuff every nook and cranny of the stuffsack as you work your way up.

NEVER roll a sleeping bag of any kind B/C it will pull & tear the insulation towards the foot and/or tear inner baffles.

And remember to store your bag at home in the loosest possible way in a big storage (trash) bag.
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"There are no comfortable backpacks. Some are just less uncomfortable than others."