Well, Kiss ... ahem ... I'm glad that you're not trying to insult strippers, but that capitalised A REAL ONE certainly conveys the idea of a snide remark. In defense of us strippers (btw, we prefer the term 'exotic dancers'), some of us are REAL ONES as well. I have studied ballet, modern and ballroom dance.
Now back to the question at hand. When dancing, a dance belt is a must ... as indispensible to a dancer as a jock strap is to an athlete. Not one with a large pouch. It should be as snug as possible to hold the penis in the vertical position against one's groin and belly. I recommend a T back; those with a partial back can cause visible creases that are most unattractive under tights. If the pouch is not tight enough, that's when you experience the jiggle.