>>519573827
If my feet get cold before entering bed, they stay cold no matter how long I wait. Sometimes I kick frantically to generate friction and heat, but it's easier to just grab a little heating pad and stick it over the sheet and under the blanket. If I couldn't do that (like in a power outage, or if I were morally opposed to any plastic in my house) I'd do it the old fashioned way where they take a pan (cast iron?) and put some hot coals in it, and stick that under the sheets before going to sleep, to preheat the bedding.
I wish my parents had any concept of this. All my childhood I had trouble sleeping because the house was so fucking cold. Being a kid, I didn't think much on it; I just accepted my misery and lay awake shivering for hours every night. Now that I'm grown and more informed, I don't let my kids suffer in an icy bed.