You act as if this were a DW-staple.
What? In New Who it inarguably is. Hell, the companion's mother slapping The Doctor was a dumb recurring gag in the RTD era.
I can't think of a moment where the Doctor didn't have it coming. I'm surprised that Rory didn't deck him regularly.
The Doctor can be an arse, he surrounds himself with women - of course they kick him in nuts from time to time, deservedly so.