The intro is basically a flip-flop of the classic porn trope: Instead of the hunky poolboy who comes to unclog a drain, both with the pool and the previously demure housewife, we get a dorky boy left in care of the house (and pool) by a sexy housewife.
His imagination runs wild and he winds up rummaging through drawers and then his own drawers (if you catch my drift).
But no real woman could possibly fit in his pubescent fantasy, so that's what he gets: Sex-ready chicks from the uncanny valley. They seem real but are clearly not, both in terms of appearance and her abilities, with the action getting increasingly absurd as the video hurtles toward its climax.
Totally unsafe for work. Totally genius.