I watched a program once that touched on this. it pointed out that a married woman who was having an affair was more likely to conceive the lovers child because she was enjoying that sex more. like you said...the orgasm has something to do with fertility. But I’m not excusing adkins remarks as we know many women who are raped become pregnant.
I think it is that women are more likely to have sex with their lover when they are ovulating. But all this speculation in search of far fetched scenarios is idiotic in light of the fact that pregnancies from rape happen frequently and only zealots try to deny that reality. @@@@