Me'ain Hameora (Shabbos 60b)

This is only tangentially related to today's daf but I thought it was interesting. I can't remember where I saw/heard this (it was a few years ago) but I'm not making it up and I apologize for not saying it in the person's name.

Why do women not wash mayim acharonim? It's not a mitzvas asay shehazman grama so they should be obligated just like men (assuming men are still obligated). There are some contemporary poskim who do say that they are chayavos but the vast majority of women do not wash mayim acharonim. I once saw an answer based on our daf. There are two reasons given for mayim acharonim. The more famous reason is because of melach sdomis. Tosafos says that doesn't apply anymore so based on that neither men or women should need it. However the gemara in Chulin (106a) also relates a story as a reason:

Mayim Acharonim caused a man to divorce his wife, he (Rav Dimi) was referring to 'Reuven', who saw 'Shimon', after having eaten a meal of lentils, deposit a purse-full of coins with his wife, before leaving the house without washing Mayim Acharonim. After waiting a while, he approached the wife and told her that Shimon had sent him to fetch the purse. When she asked for a Siman, he told her that they had eaten lentils, which he learned from the remains of the meal that surrounded Shimon's mouth, upon which she handed him the purse. Note, that Mayim Acharonim is also meant to wash the remains the meal from around the mouth. When her husband returned home and discovered what had happened, he divorced her.

I once heard that this is a second reason that the Chachamim instituted mayim acharonim and this reason might still apply today even if the melach sdomis reason doesn't apply anymore. If this is the only reason left then it will only be necessary in a situation that is me'ain hameora. So it would only be necessary if it's a man because it wasn't a woman eating in this story.