The people at Tecmo Games, makers of Ninja Gaiden, the next Metroid, Dead of Alive and the forthcoming Dead or Alive Paradise are in on the joke - or the fact? - about their customers' use of their products.
Not all of Tecmo's games feature women who are practically falling out of their bikinis, jumping up and down so that their breasts bounce as much as unrealistically possible. (Surely, Metroid: Other M will not!) But to promote one that has such features, Tecmo is going with the OK-our-customers-masturbate-to-this-game angle.
The video above is part of that promotional effort.
At least they're not being coy. Honesty in advertising?