Oh thank you, I've fixed the typo!
One rationale women use is that "everybody makes a mistake". Maybe the guy was being chased and chased by an attractive woman and he finally gave in in a moment of weakness.
Sort of like if you know you shouldn't eat that piece of chocolate cake but someone keeps offering it to you, and offering it to you, and puts it on a plate in front of you and hands you a fork - and maybe you then give in and take a bite.
If for example you have a 20 year marriage and have built your entire life with a person, it can be tempting to think "it was a one time mistake, and it was all "her" doing, and it can never happen again."
