Just a creative thought to share.
I wish one day airline passengers can use the airphone headset in front of their seats to communicate with someone in the same flight. Let's say the guy sitting in 3B looks cute, you just need to pick up the headset and dial 3B to textmessage him. You can also send conversation request to him, if he accepts the request, he will pick up the headset and talk to you. Better yet, if the guy in 3B does not respond to your request, you can text message the person in 3A for seat exchange.