he wouldn't have said it if u weren't loud. so stfu!!

I would have explained that while its true I may have been conversing loudly, that he was being just plain rude. When your calm and polite it makes the other person look like even more of a jackass. I also would have nudged his seat every so often on the plane journey, especially once his dinner was served :P He had the right to ask you to keep it down, but the way he did it was wrong so you have every right to get your own back.

I'd have talked even louder the entire ******* flight, and I'd have buried my knees in the back of his seat.

^ This. If you're being honest OP, I'll bet you'll admit you were talking a bit loud, and you can understand the guy's point. On the other hand, he probably didn't need to be a dick about it. I guess the lesson we've learnt today kids, is that sometimes, people don't behave in an ideal manner.

that's rude. you should of told him to stfu, it's not like your not paying for the flight. if I was you I would of moved if the flight wasn't fully booked anyway.

Shoulda said back, 'Sounds like a personal problem, bro' ...who does dude think he is? Bring some ear plugs, or head phones, or...I don't know...just mind your own damn business. That's life, sometimes people are annoying. Read a book, ignore it the best you can, and keep your mouth shut. FHL, OP...I woulda made it hell.

You needed it if you were loud

OP people like you are one of the reasons I hate airplane flights. As if being stuck in a pressurized aluminum tube several miles in the sky with barely enough room to move for several hours wasn't bad enough without listening to a loud and annoying passenger. Meet him halfway on his advice and talk lower.

get over it

You should have switched seats with the person in the middle seat next to your new friend. That way you could talk quietly, face-to-face, and then make out. On a 9-hour flight, who knows what else you might do? Hopefully, Mr. Grumpy won't be offended by your sex noises. He probably will, but tough crap.