It’s known as "navel pulling," and involves massaging castor oil on your belly button and abdominal area. To do what exactly?

But no one knew the answer. So for three years he collected his own belly-button lint to find out. And after interviewing friends and analyzing 503 of his own samples, Steinhauser discovered the ...

the belly button should be straight, but it has become round. With this belly, I can't do the lingerie shoot. I will try to dig up my abs as much as possible in the next week. What should I do?" ...