OK that's from a Brazzers parody porn film and not a particularly good one, although I have obviously only seen the above preview.
For a more realistic parody porn Doctor Who, there is a film by Woodrocket that nails the look rather better. The following links to the four parts of the film Doctor Whore are obviously very NSFW
Part 1 has the Matt Smith Doctor and a worryingly convincing Amy
Part 2 has the Matt Smith Doctor and a not quite so convincing River Song
Part 3 has the David Tennant Doctor and a fairly convincing Rose Tyler
Part 4 has a rather disappointing female Doctor, a poor Martha Jones and an even poorer Captain Jack
Hopefully Peter Capaldi will not disappoint tomorrow.