little brother who wishes he had a thick cock instead of a little tdick, and confesses this to his big brother. he wished he knew what it felt like to have one, what it felt like getting harder, jerking off with it.
"do you want to try with mine? just so you know what it's like?" his big bro asks. before he can reply, his big bro is pulling his dick out of his pants and it's already semi-hard. little bro's mind goes blank and he feels his mouth start to water, unexpectedly, and he can't find the words to reply. he's not supposed to get turned on by this. his big bro is just teaching him. it's not sexual.
little bro's silence suits big bro just fine. he takes his little bro's hand and places it on his growing cock, keeping his own hand wrapped around it. "you stroke it like this, and give extra attention to the tip," big bro instructs, and jerks himself off with his little bro's hand. little bro can't keep his eyes off it, can't get over the heat of it, the weight in his hand.
it doesn't take long before big bro removes his hand and little bro is jerking his big bro off all on his own, still mesmerised. he's conscious of the growing wetness between his legs and embarrassed about it. his big bro is trying to do something kind for him and in return, he's having these inappropriate feelings. he can't help it.
"you're doing great," big bro says. "now i'll teach you how to suck dick." little bro can't think straight as his big bro repositions them so little bro is kneeling between his legs, eye-level with his rock-hard cock. "lick it," big bro commands. little bro does, the heady scent making him feel dizzy. "now put it all the way in your mouth."
little bro can't think of anything except his big bro's cock - so he doesn't think about how this has nothing to do with experiencing what it's like to have a dick. he just obeys. he lets his big bro grab a fistful of hair and set the pace, eventually forcing his little bro deeper onto his cock, cumming into his throat like he was just a fleshlight.
"you could do better, so I can teach you more next time," big bro says, all smiles, putting himself away. little bro nods, gasping, trying to remember where he is. the only thing he can think of is how badly he wants his big bro's cock, more, more, and how he's a terrible person for it. his big bro is trying to teach him. he's going straight to his bedroom to touch his tdick until he cums.