I sure agree with you on that. To me it is an implied submissive position to be sucking cock that way.
With some of my craigslist encounters from a few years ago, a few of my favorites were when a hot young guy would come over who identified himself as being straight, and he would lean back against my dresser or the wall and I would get down on my knees, open his pants and take out his usually already hard dick from his pants, and suck him off.
That kind of a scene really turns me on. No words need to be said. We both understand our roles. He gets his satisfaction by blowing a load, and I get my satisfaction in swallowing his seed. Its a "win-win" situation to my way of thinking.