I see lots of threads about people wanting to sit together, what's the big deal with it? Perhaps being a guy I am either inherently stupid, or just insensitive but if I'm traveling with someone I figure I'll be spending enough time with them while at the destination that a few hours not together just won't matter.
Even though I have this view, I’m fine with someone wanting to sit with their kid but that’s different than needing to sit with a SO of an adult age.
True story, one time I booked a flight with a friend where we had a window/isle (now I would just book two isles instead) and the person in the middle quickly figured out we were traveling together. They offered to switch seats so we could sit next to each other and we both said “no thanks, I’m spending enough time with her/him over the next week”. I then added “besides middle seats suck”.
If I travel with a colleague I don't really care.
If I travel with my kids (2 and 6) obviously I'm going to make sure all of us are together.
If I travel with my wife, I'll upgrade her to first and I'll take economy! LOL