I see your arguments but maybe, sleeping in separate blankets is the symptom of an already deteriorated relationship and not the opposite, meaning the banquets are not the cause, they are already the consequence.
The other day I saw an interview with one of the most prestigious "sleeping therapy" doctors in the country and he mentioned we should sleep in separate beds, maybe not at the start of our relationship but as we age, his theory was we should. I told my dad who is 85 and still sleeps with my mum who's 85 and he said....Yes, and why doesn't he tell you to go spend the night with another partner? maybe some would also get better sleep :)