ブタ腹
http://blog-imgs-35-origin.fc2.com/r/u/b/ruby187ruby/20110615120706832.jpg
猫ブタ腹
http://blog-imgs-46-origin.fc2.com/e/a/r/earthnews2/200603131909301.jpg
○○ブタ腹
http://maniax.dlsite.com/modpub/images2/work/doujin/RJ045000/RJ044193_img_main.jpg