three

Here's something you might not know:  The straight-backed chair has been around for thousands of years, but it's one of the reasons 80% of Americans have back problems. Basically, we're just not meant to sit at a 90-degree angle, and our bodies are more comfortable either kneeling, reclining, or sitting on a stool or a bench.  So you've been sitting wrong your whole life and never knew it. Here's

Everything happens faster in the digital age:  BETTY WHITE went from "Golden Girls" has-been to "SNL" host in five months . . . the homeless guy with the radio voice blew his second chance in record time . . . and, well, CHARLIE SHEEN. So it's not really surprising that couples are getting sick of each OTHER quicker than ever now, too.