Being straight and all, it's probably not a good idea to try and give a blowjob to anyone. You're better off just receiving.
You tentatively pound twice. A few seconds pass and the voice sighs. "They always want it done to them. Oh well, let's get this going."
Feeling slightly embarrassed, you pull down your pants and underwear. Your limp cock hangs pitifully from your groin. Shame boils up and you're about to call the whole thing off before the voice calls out angrily, "I SAID I don't have ALL DAY!"
You clumsily jam your cock into the hole. The voice chuckles. "A little soft, huh? Well, I'll get you fixed right up."
Lips close around the tip of your cock. You feel a tongue slide down the length, biting down ever so slightly. You suddenly and involuntary moan, sending sparks of pleasure flying down below. You feel your cock growing, lengthening and getting stiffer. The tongue licks around again, massaging the tip, grabbing the back end with one hand, squeezing. You moan in delight, going fully erect, a pressure building.
With one gasp, you cum into the voice's mouth, expelling your seed with great pleasure. You feel your cock go limp again and you sigh. That was great. You'll have to try again sometime.
You go to pull out but suddenly feel rough hands clamp around your cock. You gasp and try to pull back but find resistance. The voice laughs. "Where do you think you're going? That was only round one..."
Before you can cry out again, something happens.