I have never gotten into the sounding thing but I do love that pussy spreader!
Roxy Ray has a well stretched and well used pussy. Here she engages in a bit of Urethral Play by sounding her peehole with a paintbrush handle.
Urethral Play and peehole stretching is quite addictive among those who have tried it. It is important to avoid infection and injury, so inserted items should be sterile and smooth. Purpose made urethral sounds are therefore best.