There was a lovely video making the rounds a couple of days ago.
20 pairs of gorgeous strangers making out. Then it came out that they were actors and it was an ad.
People questioned the good feeling.
I think it makes sense to ignore the story, because the reason it feels great is that we empathize and remember times when we've been there, and the body can't tell the difference so it releases the chemical that makes you feel all happy and great when you're making out with someone desirable.
The action isn't happening on the screen it's happening in your blood and your brain. You're getting high, and it's lovely. Who cares how it happened.