"Oh, nothing much." Jerry replied, eyeing the 'reproductive organs' entry on the list and then his and Josh's shared crotch. "I was thinking of giving us a bigger...you know..."
"Seriously?" asked an incredulous Josh. "We're only 12 and you want to give us a bigger dick?"
"To be fair..." Jerry answered back, "...we're about to turn 13."
"Ah, geez...I totally forgot!" exclaimed Josh, face-palming himself with his front hand. "Tomorrow's my - or I guess it's now our - 13th birthday."
"If it's any consolation, I think it's fair to say we BOTH forgot." Jerry answered back, trying to lift his twin's spirits. "But getting back to the subject at hand, I wasn't just thinking of making our shared dick bigger: I was also thinking of giving us bigger..."
"Unbelievable!" snapped Josh, cutting his twin off. "You choose NOW of all times to nurse feelings of...inadequacy?"
"They're your feelings too!" Jerry answered back. "Don't forget that we used to be the same person."
"Edward ceased to exist the moment we became Jeremy and Joshua." Josh retorted, his ire growing. "And I'm not about to let you or anyone else use this shared body of ours as a canvas to play out some weird deviant fantasy! If that's what you want to do, do it on your own time, in which case...it'd be better if...if..."
"IF what?" a now-visibly hurt Jerry asked.
"IF WE WEREN'T CONJOINED TWINS ANYMORE!" Josh angrily blurted out.
"Acknowledged." the program wizard interjected. "Commencing full-body mitosis now."
Before either could stop it, both twins were forced back down to the floor in agony, their shared body wracked with excruciating pain. Though neither twin could force their eyes open long enough to see what was happening, both could clearly feel their shared body growing wider and wider as new bone and muscle - and indeed, new limbs and organs - were filling the divide between their respective halves, the newly-added mass ripping their clothes almost cleanly in half in the process. As each twin's body finished forming and filling out, the two boys separated and collapsed onto their backs: where once there was a fully-clothed, two-headed boy with four arms, there were now two LITERALLY half-naked boys, each with a single head and...