I prefer a cooler sleeping environment, while she prefers a warmer one. I came up with this simple solution; by using an old sheet as a pocket, I filled her side of the comforter with stuffing and now we both get the good night's sleep we want at both of our ideal sleeping temperatures for a fraction of the cost of an electric blanket and without the clutter of a ton of blankets on the bed at night. You will need sewing materials, quilt stuffing, a comforter, and an old sheet for this project; alternatively, if the comforter doesn't have stitching in the interior, the old sheet is not necessary. This cost me roughly $50 to put together; a fraction of the cost of a fancy heating blanket that fits both of our needs.
Step 1: Fold the Comforter in Half and Stitch a Center Line As a Reference Point.
This is for reference, and in the case of a comforter without interior stitching (not the one I used) stitch a line down the middle. In a comforter without interior stitching that will get in the way, this will act as the barrier to keep the extra stuffing secured on one side; for a comforter with interior stitching such as the one pictured, this step is just to create a reference line.
Step 2: Place Your Sheet Over the Center Line, Folded Over the Comforter.
Stitch the comforter and sheet around the top and bottom, leaving the middle part (the part over the centerline stitched in the previous step) open for now.
Step 3: Fill the Pocket You've Created With Quilt Stuffing.
I got the stuffing at Michael's for $15 for a 2.29m by 2.74m bag; this is more than enough. Place as much stuffing as desired in the pocket. Bonus tip: Place extra by the feet, feet get cold fastest in the winter months.
Step 4: Stitch the Pocket Closed.
And that's it! You're done! Enjoy your sleep at the perfect temperature for both you and your partner.