A penis plug is a piece of stainless steel that is inserted into the urethral opening for sexual play and stimulation. I need to express that objects that you find around the house are very unsafe. You will also find websites out there selling plugs made of multiple materials. The safest out there are made of the highest quality Surgical 316L Stainless Steel. Penis plugs are a form of sexual exploration and stimulation for both men and women. Women have only come aboard with this pleasure over the past couple of years. Men are the largest group using plugs, but women are now getting into the act of receiving when they mostly were the givers. Some women purchase these as a sexual aid for their male partners, but plugs can also be used by women. Women usually wish a smaller shorter plug.