Urethra stretching

[sounder1]

Does anyone have a good way of stretching the inner sphinchter muscle near the top of the dick so that sounding can be done easier?

 

[B_CBTallthetime]

just keep on sounding man, and use a larger and larger sound -

You'll get your finger or thumb down that hole in no time...

 

[EdWoody]

A. There are no muscles or sphincters inside your penis, only the one that connects the base of your penis to the rest of your body.

B. Eww.