A man is "porned out" when he has watched so much porn, he loses touch with reality. Typically he over-manscapes, with the misguided impression that it makes his dick look bigger, and insists on trying painful positions he has seen in skinflicks. Usually thinks he's amazing in bed, but has no idea of what a woman wants.
"I really liked him until we got busy. What a disappointment, he's totally porned out. (sigh)"
"He really porned-out his junk, so he looked like a hairless twelve year old. (shudder)"
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.