If you're aslave, you're not awakened to the fact that you are being enslaved. Falling aslave is a human condition which you enter with your own free will, not through the force and will of somebody or something else that commit the act of enslavement upon you. Like being asleep, you can always wake up from sleeping in so far as it is in your free will to go to sleep or stay awake. Being enslaved is when someone makes you a slave and cause you to lose your freedom of choice or action; being aslave is when you let that happen to you.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.