Maybe if you actually referred to this type of play by its proper name, you'd have some luck.  Urethral sounding is  really intense, and for women it can be incredibly pleasurable; but there are a lot of risks involved with female urethral sounding that aren't present for men.  

Quite frankly, if I were into receiving urethral sounding, i'd be much more apt to respond to someone who actually sounded like they knew what they were talking about.  No lady likes "her pee hole played with".  Sounds like injury waiting to happen.