Not too long ago, I amused Myself with My sissy roxy. As you can see from below I enjoyed branding her with My brand along with splitting the bottom of her cock head, piercing her nipples and using the burdizzo on those needless nuts. Of course as you can see from the 2 pictures below with the burdizzo, tight scrotums are much more difficult to clamp so the more stretched out the scrotum is from the body the better. A loose/stretched scrotum also aids in a successful clamping.
Recently I came across a nice addition to My Urethral Stretching/Meatotomy equipment. While it's intended purpose isn't for the Urethra, it does a great job.