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Robert is small.
Correction: Robert is average, but looks small when compared to Herman. Many people look small compared to Herman, so much so that Herman stopped noticing his large size a long time ago.
He began to take notice of the size difference between him and Robert, though, when Robert and his filthy mouth, which was dragging wet kisses down his navel, said something about Herman being big enough to hold him down and use him.
He didn't think much of it at the time, wasn't thinking much at all, too preoccupied with getting his pants off; but later, in the afterglow, when his brain caught up to him, he remembered.
Once the thought wiggled it's way into the forefront of his mind, it embedded itself there and refused to leave, calling attention to itself every time Robert stood close.
Herman could, theoretically, wrap himself around Robert and render him utterly helpless. He knows that for as strong as Robert is, Herman is stronger. He could pick the man up and just.. do whatever. Not that Herman ever would, not without explicit consent, but he'd be lying if he said it wasn't an interesting thought.
It's what Herman is thinking about now, in the privacy of his shower at home, water beating down hot, one hand wrapped around his cock and the other to his mouth to muffle his noises.
The squeeze of his hand no longer compares to the wet heat of Robert, but it's damn near midnight and Herman doesn't want to bother his boyfriend just because he's horny. He probably could, Robert definitely wouldn't mind, but Robert also needs to get more sleep than he currently does.
So here he is, jerking off in the shower, knuckle between his teeth as he thinks about pinning Robert down.
He'd have Robert on his stomach, Herman laid out on top of him like a blanket, his large hands holding Robert's wrists down to the mattress as he fucks into him, slow and deep in the way that makes Robert squirm.
He wouldn't be able to do much other than whimper and moan as he takes only what Herman gives him. Maybe he would be able to get off just from Herman pounding into his prostate and the rub of his cock on mattress.
He'd pick up the pace, thrust his hips harder, deeper, just to hear the way it makes Robert's breath pick up with it, to feel the fluttering squeeze of his hole as he gets close, only to slow down again right before Robert can tip over the edge. He'd do this a few times, maybe make Robert cry and beg for release.
Herman isn't mean though, and he wouldn't tease Robert forever. Just as he pictures the slack face of Robert mid-orgasm, he cums into his own hand with a muffled groan, drawing himself back into reality.
The water is getting cold, but he doesn't mind. He feels lighter than he did 10 minutes ago, and as he looks down at the watery cum in his hand being washed away, he vaguely remembers Sonar talking about something called post nut enlightenment. This must be what that feels like.
He just learned a lot of new things about himself that he'll have to talk to Robert about.