This crazy chair is a huge success in Japan and is designed to exercise for your waist and whole body.  But most buy it to experiment with new positions for sex.

It can also stimulate the flow of blood, improve the function of the intestines and stomach, draw the poison and keep youthfulness, worked off the fat around the waist, reinforce the flexibility of waist and belly, beautify your body and regain your pretty and slim waist. Doing exercises with this electric hula chair, you can improve your health and make you even vigorous.

According to the website, "This modern miracle combines the best of ancient traditional Chinese medicine with 21st century space-age technology. Improve your balance and coordination as it gently aligns your spine and improves blood circulation. You’ll love how it feels as it works out your abs and mid-section. And there’s no better way to warm up for any activity. You’ll never experience a more pleasurable workout! Simply sit upright in the Hula Chair, press the button and let its elliptical motion work wonders on your body."