Uh huh? So my question is, how is it easier to prove that's the case?

So the lady needs some proof that sex occurred without a condom. Then she also needs to prove both parties agreed to only use a condom beforehand. She also needs to prove that the guy deliberately took it out. Maybe they could put it on the blockchain.

The civil preponderance of the evidence standard literally can be met by ”he said/she said" testimony by whichever party the trier of fact (jury or judge, depending on if it is a jury or bench trial) finds more credible.

It’s not a crime (I mean, the same act is already a crime, but that's not the law in question), so the criminal “beyond a reasonable doubt” standard of proof doesn't apply.