When TIM started shooting bareback porn, having bareback sex in front of a camera alone would be enough to rouse controversy, and that's how they marketed their videos. But like with any other extreme, this effect wears off quickly, especially when other producers start following suit.
So maybe when taking loads wasn't any longer controversial (or perverted?!?) enough to sell those vids, they looked for more: taking loads while still in kindergarten would surely be! Of course they couldn't do any more than just mention it, but that alone would be enough to stimulate many a sleazy guy's dirty imagination...
Guess in the end it was only some kind of sales strategy, a way of proving that they were still way more controversial than any of their competitors and could still be pushing boundaries just like in their heydays...