My unscientific theory is that those ttc, try to hard and those that get pregnant accidentally aren't trying.
While there is no evidence that orgasm increases chance of pregnancy, i'm convinced fun sex does.
I suppose that the more relaxed you are the easier things go.
So if you are ttc, stop and tte instead (try to enjoy)
also don't have sex every day, while guys make sperm on demand the more frequently it gets used the less sperm per ml of semen
so maybe every other day or so from after your period right through your fertile time. There should be sperm hanging round waiting for the egg then even if you don't have sex on the day you ovulate.

There actually is scientific proof that an orgasm increases your chance of pregnancy because during an orgasm your cervix dips down and can obtain more sperm

That's odd! Well, i'm out of luck in that category!

I honestly blame the stress people who are ttc put on themselves. Just relax, and have wild crazy sex!

Yeah, but i've never been able to so with that I doubt I ever will. Maybe someday i'll get lucky.

Yes, well it doensn't work for all people. Just majority. There are still those of us who need to utilize extreme measure to get pregnant.