She needs a king sized bed.

Im the same way and Im not avoidant, I have a tough time sleeping with others, even a friend. I can toss and turn, I need to stretch, they may toss and turn, snore, etc. Im a light sleeper and now in my night sweats/going the bathroom more often years... LOL.

I will certainly snuggle, spoon, etc, wrap myself around, I love that part but when its actual go to sleep I need my side of the bed. Its nothing personal towards the person, I need sleep and I dont want to wake either with stretching, peeing, sweating, tossing, ect. Im looking out for my partner too. Sure at times i fall a sleep snuggled but do not stay that way, I wake up in a sweat or just roll over in my sleep. And I surely sometimes in the night spoon in and snuggle and will roll back over eventually again, sweating... LOL I like the spoon in and snuggle in the morning when its about time to wake up and we hit the snooze a couple times, a little snug and hanky panky or just some snugs. haha.

My ex sweat, snored, and tossed and turned, I had to go to the couch several times just to sleep. He did not take this personal at all. Id always end up back in bed when it was almost wake up time to snug. What I would of done to have another bed to go to instead of the couch or a giant bed so he can be on his side. Sleeping on the couch is not so great either... If we had another bed and I was still a sleep he would of come in to snug me in the morning.

Best sleep I had dating a guy was one with a California King, we snugged and both moved to our sides and sleep, and same thing, sometimes snug in the night then roll over again. He was a secure.

All that said, I can see this for avoidants for sure but some of it may be like how I am with my space in bed/even separate beds. Not everything is about avoidance.

My avoidant was pretty snugly/reciprocated mine but we only saw each other twice a month. To add: I even needed my space to sleep with him and he had my AP side triggered. I was very tired after a night with him, anxious triggered and poor sleep. My secure side keeping the AP in check was draining me and I didn't even know it until this attachment thing. Its like how anxiety states drain you I suppose, my attachment was fighting with each other.

Fyi California king is actually taller, but not wider, than a normal king.

Same here.. It really annoys me when my sleep suffers because someone is taking up so much of my half of the bed (I have bipolar, so a sleep routine to regulate circadian rhythm is incredibly important)
I'm not allergic to affection, but if I'm trying to sleep, I need the conditions to be just right in order to actually drop off to sleep, and bed time is meant to be comfortable for you to actually be able to relax into sleep... if your nervous system is all out of whack because of the closeness, I'm not being funny, but it's not fair on yourself to just lay there all tense when it should be a relaxing and winding down routine

My FA GF sleeps in a pillow fort. She keeps a pillow on each side of her. If we're in my bed, a king, its not an issue with the exception of me stealing one of the cuddle pillows in my sleep (only way I can break down her walls!). In her bed, a queen, its kind of a pain in the ass. She's already mentioned when we go on our cruise she may sleep on the pullout since the bed is a queen....not something I'm happy about.

It's silly, someone sleeping habits have nothing to do with their attachment style.