I know exactly what you mean.
It seems like when a video is a FETISH.. such as feet or spanking.. they leave out the SEX!
Something else I have noticed is that since the advent of Onlyfans, the volume of porn has gone up, but the quality has gone way down.
If I was a porn director, all of my performers would have a good haircut, be fit, no hair in asscrack, and they would not spit cum out as if it was poison.