We all love cuddling somebody before we go to sleep, but when you actually pass out, it's time to go ass-to-ass, and take over your separate sides. From above, you look like a butterfly!
"Dude, I love cuddling her but when I'm about to pass out, we just butterfly cuddle"
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.