You are so lucky. On a red eye, I got stuck next to this monstrous mayo gender (it was once female) who acted like it wasn't her fault at all for overflowing into my seat. Literally, "There's nothing I can do!" I snapped back, "How about putting down the fork?!" I tried to get one of us reassigned, but it was no use. Six hours of flab in my lap, couldn't sleep, and the airline gave me a measly $100 voucher for allowing a disgusting waste of space to encroach on the space I paid for. Now, I primarily fly Southwest, where you choose your own seat, and pay for early boarding. As the plane fills up and fats eye that middle seat next to me, I give them death glares. Not once has a fat tried to sit next to me. You can see the hope in their eyes, like, "Oh, look, a miniature person!" (I'm 5'1", 104-ish pounds.) Then they get closer and see my glare o' death. I take my resting bitch face to a whole new level. It works - every single Southwest flight I've taken, I've been sitting next to humans, usually a pair of friends or a nice couple who make polite conversation with me before takeoff, then mind their own business for the duration of the flight. My favorite flight, two girls in their twenties were next to me, and we talked about our various workout routines and favorite healthy recipes.