Is it mandatory for married couples to sleep in same bedroom for all 7 days of week ?
I do take your question seriously, and no, it is absolutely not mandatory. I know several married couples who have their own rooms and do exactly what you said: they spend some nights together and some nights apart. The reasons are many: 1) Snoring 2) Different work schedules 3) One likes to fall asleep with music or TV; the other doesn’t 4) One tosses & turns a lot and makes it difficult for the other one to sleep 5) One sometimes like to watch movies late into the night on weekends 6) Just needing a little space There are so many really important things that make a good marriage: trust, respect, fidelity, etc. etc. I actually think that a little bit of space can strengthen a marriage and give each person some alone time to be at one with their individualism. Some people never want to be apart. But no, your question is not stupid and you bring up some very valid points.
