Contractions and Penis Control ?

First post but been crawling a while...So I will try and explain this as simply as I can.

When doing the contractions, it is normal that flexing the PC muscle will also move your dick around too right?

I find this to be distracting and counter to the no hands rule. If your dick is moving around it's going to touch your belly or leg or whatever... causing sensation. I counter this by wearing underwear, but then your dick is hitting the underwear and sensations there too. Seems to distract from the prostate sensations similar to touching your dick would.

Also I find that when I start getting mini os my dick gets hard no matter what. In fact I'm hard almost my entire session which causes its own distraction and is what keeps me from getting my super o I think.

Any comments or suggestions?