Sorry to report that the side boob you found so titillating was nothing more than a bunch of zeros and ones. These sprays are used to give the effect little details like sweat while having sex which will further enhance the reality of the scene. Tits and ass are more than just seen, they're grabbed, slapped, licked and fondled. These are exact replicas of male and female genitalia. VFX is also used nowadays for nude scenes. The shower scene from Central Intelligence. How can I meet a Hollywood actress?
That would be on the extreme end of the spectrum on a higher budget project most likely an A list actor in a film like that One thing to keep in mind
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Here are a few examples where you realise your life is a lie: Salma Hayek is a busty work of art. The requirements and controls for having actors appear nude in film and television are very well-established. VFX is also used nowadays for nude scenes. I guess the thought of being groped by Adrien Brody on camera was an opportunity to great to pass on.