a good rule to go by

The danger for the couplet, a short endlessly recurrent metre, is an effect of sameishness.

'[H]er luggage contained only a chiffon negligée so elaborate as to be more a tea gown than a dressing-gown.'

It is commonly thought to be due to urological surgery and particularly instrumentation but it can occur without this, such as with the kippering of the urethra that one sees with an indwelling catheter (Fig. 4.6.9), or the damage to the shaft of the penis and the urethra within caused by protracted condom drainage.