You don’t.

I bend my arm and put my hand under my face, thereby converting it into shoulder pain.

I mean, how serious do you want to get?

https://sonusleep.com/

If I keep it under their neck, it usually doesn’t fall asleep as fast.

You don't actually spoon the whole way, just up to the waist, leaving a bit of a gap between your chest and partner's shoulders.

Upper arm goes round partner as normal, lower arm rests elbow on mattress, forearm vertical across their back, hand holds their upper shoulder.

Plenty of contact still, but your arm doesn't die, you don't get their hair tickling your face all night and you get to use your own pillow.

There's special pillows designed for this that have a little passthrough for your arm and a small amount of sturdy material so your arm doesn't get crushed.

Called couples pillows or or cuddle pillows or something like that. I have wanted one for some time.

curl it up under your chin like the statue "The Thinker"

Took me a while to figure out too! Turns out, it's easier for the smaller person to be a big spoon.

If you're larger than your partner, lay lower in the bed compared to your partner. Your face should be at their back. Pull that cushion down with you to help your neck. If they curl up a little, your arm can bend a bit forwards as it ends up at their legs, and it won't fall asleep at all.

Happy napping! 😉

Along their back or between my legs. Something like this:

Wait until she goes to sleep. Then get up to fix your arm, get chores done, etc, and go to bed at a more normal time

Sometimes sacrifices must be made.

My ribcage rests on a memory foam pillow. My head rests on a buckwheat pillow. My arm goes in the gap between the two pillows. The buckwheat pillow is easily remoldable so my arm can go underneath and find a good angle without making my head feel unstable.

Because of that I only spoon in space.

What is this post even talking about why does your silverware have a pillow

Under my partner's neck, between their shoulder and the pillow

I build a bridge out of our pillows. Two bor the base, then one spanning a small gap. I put my Earthward arm's hand up the the gap and my head on the bridge pillow.

Nothing falls asleep improperly.

That's like a metaphor for our whole relationship. I'm out. I'll meet you at the food court.

You're*

The spoons are the same size. Two different size spoons don't fit against eachother.