[ Very useful, indeed. It's not that Jim does it on purpose, really, but it's kind of hard to hold himself back when he's riding fast towards his orgasm, the peak closer and closer as they both keep going. Finn clearly shows no signs of wanting to slow down or stop, and Jim's a little past the point of being able to on his own.
He heeds the push of that hand, at least, and his hips don't move quite as sharply again. He still rolls them in short little thrusts, though, a bit shallower now, his gasps and moans louder the closer he gets. His fingers curl and his nails dig into the back of Finn's neck, hopefully not enough to hurt, but admittedly he's not paying much attention to that.
Between his hips and Finn's head moving almost in tandem, and that sound turning to vibration around his cock, it's but a few seconds before he reaches the edge and climaxes. He cries out, hips jerking once, twice, then he comes in spurts into Finn's mouth, his whole body tensing and trembling as his orgasm washes over him. ]
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He heeds the push of that hand, at least, and his hips don't move quite as sharply again. He still rolls them in short little thrusts, though, a bit shallower now, his gasps and moans louder the closer he gets. His fingers curl and his nails dig into the back of Finn's neck, hopefully not enough to hurt, but admittedly he's not paying much attention to that.
Between his hips and Finn's head moving almost in tandem, and that sound turning to vibration around his cock, it's but a few seconds before he reaches the edge and climaxes. He cries out, hips jerking once, twice, then he comes in spurts into Finn's mouth, his whole body tensing and trembling as his orgasm washes over him. ]