4 ms·It's not actually a pun (at least, AFAIK), but interestingly, 肛門 (anus) is an homophone of 後門 (back gate).by glandium 4y agoIt's not actually a pun (at least, AFAIK), but interestingly, 肛門 (anus) is an homophone of 後門 (back gate).