Do you believe corporal punishment was abolished in schools because they found out certain pupils were secretly enjoying it?

I doubt it. What happened is more people realized that it's barbaric and didn't want it inflicted anymore. As others have pointed out, nobody cared if any of the students enjoyed it, but the teachers enjoying it was a problem.

During the Rodney King beating trial, it came out that one of the LAPD chiefs (not Daryl Gates, another guy whose name I can't recall) had given a sermon in a church where he was a lay pastor, where he talked about beating children until he raised welts in their skin and how exciting this was.

Edit: It was Robert Vernon. If Gates was Stalin, Vernon was Beria.