Use lots of lube and slowly insert the plug into the urethra. Adjust the diameter of the plug for a multitude of sensations by squeezing the bulb. When you’re ready to remove it, release the pressure and slowly pull it out.
This is going into a sensitive part of your body, make sure it is sterilized before using. Dip the part that will be inserted into boiling water for 5 minutes to sterilize it and use sterilized lube too. Wash with soap and water after each use to help keep it clean. Do not dip the valve and bulb in the boiling water.
Diameter of the plug