I think there was an effort in the past to make sure it’s a family show and disconnect The Doctor from the more mature parts of the whoniverse. Maybe the changes in production and, maybe, the realization adults are too obsessed with it create new avenues for money making creativity.
The ones with the memory loss when you stop looking at them? Oh yeah absolutely
Who? What episode is that? I don’t recall ever seeing them
You might want to check your arms…