Like black_rose has said, a lot of people assume sahm's do nothing but shop all day, sit on the lounge watching oprah and days of our lives etc. And those people are the ones that can't understand why our houses aren't in prestine condition as well lol.
I'm very proud to be a sahm. I've tried working p/t, then I tried working f/t. For us personally, it didn't work. It works better for me to be at home with our kids.