Communicating Through Gloryholes

I wish there was a better way of understanding what the guy feeding me his cock is wanting. Sometimes the guy pulls his cock away, is he unhappy or is it so good he doesn't want to come too quick? Yesterday I had two of three men I sucked pull away and then sit down for a couple of minutes. Then they stood again and I finished them off. What does that mean? WTF

Some guys I will suck until I'm wearing down and then add my thumb and forefinger to slide along the base very gently in sync with my mouth. Always, always I keep my tongue swishing back and forth on the underside and that seems to be appreciated. In other words, as I'm going up and down I'm simultaneously swishing my tongue back and forth so its somewhat of a zigzag. If I have to rest my neck I will still maintain the tongue motion. I have found from watching glory hole videos that it is actually beneficial to pull off completely for a few seconds every minute or so until you are in the push for the finish. Now adding in my hand may sound like a step down, but while I'm in the booth I'm using my hand on my pussy as well, so by the time I'm working my hand on him my hand is very soft, smooth, and warm and slick like a pussy. I try to mimic a pussy feel because I focus on straight guys and I think that's what they want. (I judge straightness by a combination of appearance and what videos they selected to watch, not foolproof). But if they're still not coming I will go firmer and faster and firmer still and faster still until its insane and usually they will come but sometimes even this won't make them come.

What is perfect cocksucking to one guy is poor cocksucking to another guy. Wouldn't it be great if every guy could review your skills on a form and rate you so you could improve and know where you stand? I want to be the best.