I agree. You should avoid talking about your dick or its size in the early and middle game. Only way for her to find out is having a guess on your size when dancing on the dancefloor during night game. Our physical asset down there is not an advantage for improving our game. It could be a tool to get you a second bang, but then indeed she might want more and more.
"Fart, and if you must, fart often. But always fart without apology. Fart for freedom, fart for liberty, and fart proudly" (Ben Franklin)