I generally don't mind being asked to swap seats, but unless I'm being offered another aisle seat in F that is neither the bulkhead or the last row, 99% of the time I will decline. I do have a problem with other pax telling me that I need to swap in order to accommodate them and then giving me attitude when I say no. The last time that happened, one of the couple wanting to stay together called me an assortment of unpleasant names for saying no. It was such a lovely experience. NOT.
I do think that the next time I'm asked the condition will be both another aisle seat and not on first or last row. I honestly don't really get the whole wanting to sit next to each other thing in the first place. My wife and I fly together a lot and almost always in F. She watches a movie and couldn't care less if I'm in the seat next to her or not. The people who wanted me to swap all watched movies, and you never would have known they even knew each other during the flight.