Was it ever actually said or even dwelled on why he regenerated into 10 again?
Because he missed being 10?
Also, the Doctor was 10 for about seven years, but 11 for well over a thousand.

RTD was baiting for content. I wish he was cancelled along with Barrowman. He probably deserves it more than Barrowman too.

>>212712659 (OP)
Unironically 13's era depressed Doc so much he became 10 again to live with Donna. Problem is Donna has a tranny son now so the new Doctor is more mentally unstable than ever.

>for the dads

>>212712659 (OP)
Why is there no rule34 of the 13th Doctor getting fucked by an earlier Doctor?

>>212712659 (OP)
There was some throwaway line about how he "wanted to come home" and for the Doctor (read: the general public) Tennant's face and Donna Noble is apparently home.
You're not meant to think about it. RTD doesn't actually want you to think hard about any of this new NuWho.

>>212713929
Because the show's already masturbatory enough as it is.

i pitty the fools trying to come up with in-universe explanations for the shit these guys serve you. This show desperately needs to die for the good of scifi