God damn your hot!When his cock is in my mouth, he's "my man", and I'm the "cocksucker". OF COURSE I want him to take charge (and discharge!).
It's his cock, he should tell me how he wants me to suck it. He can put his hands on my head and guide me where he wants me, he can say whatever he wants that helps him launch his seed.
About the only thing I don't really need to hear is a 'gonna cum' warning - he can tell me if he wants to, but - let's face it, his dick is in my mouth and I'm sucking it. Cum is going to be a very real probability.