Good plots are good. Bad plots are bad. It's as simple as that.
A good plot takes an okay scene and makes it one of the hottest scenes ever. Such is the power of information. What's so hot about seeing a fat guy fuck a girl in a swimsuit? But learn that he's hypnotizing her and bit by bit her brain is losing her former sense of self and transforming into the version of her which only exists while under hypnosis (i.e. she's becoming the fictional her! she's genuinely turning into a sex-starved slut!) and the scene skyrockets into the stratosphere in its hotness.
A bad plot, on the other hand, is a waste of everyone's time. People who can follow what's going on say "man, this is boring." And people who can't follow on also say "man, this is boring." Everyone's bored by a bad plot.