Do you guys think that a!Dave recorded a video on how to pee standing up for Dirk to watch when he's old enough? Sure a!Dave knows his lil bro will be smart, but also he can't imagine how difficult it would have been to learn that without someone standing there and telling him what to do and how to aim and whatnot. The video is useful, but it probably gets watched more when Dirk is a teenager than when it's actually useful information.
Yeah, Dirk has so many fucking sex tapes of a!Dave's saved. But none of those were recorded for Dirk. None of them have a!Dave dropping his pants in a circumstance where Dirk is the only person who would see it. None of them have a!Dave holding his cock in his hand and saying Dirk's name while looking into the lens of the camera. Dirk knows that there weren't any sexual intentions behind the video. He's not delusional. He knows that it's a normal thing to teach the kid who is technically your ward how to aim for the toilet, and showing a young kid an example yields better results than telling them what to do without giving a visual.
Still, Dirk ends up getting an incidental piss kink just from watching and getting off to the video so many times. Dirk is getting every possible related fantasy to that video too, watching a!Dave pee, being watched while he pees, holding a!Dave's cock steady to aim while a!Dave pees and vice versa, etc.
(And if it turns out that beta Dave has a piss kink and happens to tell Dirk about it, that video will take on a whole new level of meaning for Dirk. Maybe it was actually meant to be taken sexually. Maybe a!Dave did somehow know that things would turn out this way, and maybe a!Dave had wanted to give him something personalized while still having (unnecessary, since Dirk will never actually see him) plausible deniability.)
