I live alone so I'm on the couch with an expanding sound , it has a thumb screw on the top to open your pee hole larger , I was to try and get a 15 mm sound in one day , So I'm on the couch with the sound in,, naked just watching a old sci Fi movie , so I'll leave it in and turn the thumb screw one half turn every 15, minutes, for 2, hours untill its uncomfortable, then one more turn fully