I read it as a swipe at the non-consensual buggery that was de rigueur at top English schools.

I looked at Wikipedia about Fleming’s schools and Eton and Sandhurst werelisted there… archetypical venues for that ingrained behaviour.

Fleming in that section of the article was highlighting that he personally had some axes to grind but kept them firmly out of his novels.

I don’t think paying for sex quite has the sting