Why do Belly Dancers have fat guts?

I was actually thinking this last night as I was trying to fall asleep. I took a dance class yesterday. It was using the principles of dance combined with yoga, pilates and ballet to tone and shape the body. You get the idea. There was a lot of squatting and tightening of the butt-cheeks, holding lunges for five minutes etc. I was holding onto the bar, stomach muscles sucked in, ass squeezed and tucked in. My leg was shaking like a sewing machine, extended in front of me for three whole minutes.(It counts as torture for anyone non-Asian). I remember thinking that tomorrow after all this excercise I will probably have to wear my skinny jeans since non of my normal clothes will fit me anymore. Yes. My body is going to be so hot!

As I was falling asleep I felt a strange excess of flesh around my hips. What's this? I thought I took care of all that extra fatty stuff at the dance class. Does this mean I won't be wearing the skinny jeans tomorrow? So I started to think about this one lady in the class. She reminded me of my sixth grade math teacher whose name I can't recall, but whom Juan Rivera called 'tomato on toothpicks' (to her face) due to her incredibly round upper-body and skinny, long legs. The lady in my class was also a 'tomato on toothpicks'. I believe they call it apple-shaped. Prepare yourself for some heart disease, lady. I mean, this class is designed to keep your 'core' in shape which is why you have to always hold your stomach in. I have done this class three times and this lady has been there everytime I have. Everyone knows her name and she holds her leg out for three minutes without crying and shaking like me. I can only assume that she has been way more than three times. Note: I have seen her naked in the dressing room. Affirmative on the muscular legs with fat gut. It is not just the illusion of clothing. So, back to my original question- How the hell can she take this class twice a week for six months and still have a fat gut?

And that got me thinking about Belly dancers.
You know, I took belly dancing classes for a while. I even bought one of the outfits that I wore for Halloween in 2003. It was definitely the hottest I have ever looked in my life. Just about everything about belly dancing is sexy. Still. Is it worth it? I am just not sure we know enough yet about the connection between excercise designed for the stomach and actually having a fat stomach. I don't want to risk it.