Your response is the typical Anglo response to Latin ambiguity. These women did not believe it, for one second. They revelled in the opportunity to defy societal norms, and used the stereotypes affixed to them by Iberian machismo as an excuse behind which they could do it.
Let's see, a guy finds four women so gullible and malleable, so easily fooled, so openly sexual and free with their bodies that they will take off their clothes at the flimsiest offer of a medical examination via satellite, and this man exploits this obvious open door to satisfy his every voyueristic or carnal fantasy by ... having them take off their clothes so he can WATCH VIA SATELLITE???? Who's dumb here??? LOL!
Y'know, the Peeping Tom/pervert profession ain't what it used to be.