I'm doing exercises for abdominal breathing, wearing only bra and panties. Sitting on the ground, I breathe deeply. I inhal and exhale air... very deeply and slowly, causing my abdomen to swell like a balloon. Look, my belly is perfectly round and smooth. When the air is out my belly is almost flat, but when the air is inside I look like a pregnant woman! My skin is extremely elastic and allows this magic to happen.