According to my urologist, who has performed thousands of RP, this is not true. The urethra is cut at the base of the bladder where it enters the prostate gland and below the prostate where it exits. The bladder is mobile and "drops" to reconnect the urethra. The penile urethra is fairly immobile and is not pulled up to reconnect.

Men do report loss of length following surgery but for many men this is temporary. Some believe penile shrinkage with RP and ADT is secondary to loss of nocturnal (and otherwise) erections which results in atrophy of the cavernosa penile tissue (smooth muscle). Reports indicate this atrophy can be ameliorated by using oral daily meds (Cialis), penile pump and/or Trimix injections to stretch the penile tissue.