Excuse me, I know you're sleeping, but...

When you fly somewhere with your Valentine, who gets the window seats on airplanes? Then your risk of death has just increased.

It turns out window seat people are at greater risk of deep vein thrombosis than other passengers. DVT is a the formation of serious blood clots in the veins which can be fatal, and on long flights, window people are less likely to get up, stretch out, and walk around. Understandable, right?  Don't want to climb over people who may be sleeping, reading, whatever to get up and get some exercise, but do it as if you're life depended on it.

Just remember to say excuse me.