It's not difficult to start an argument about relationships on the internet. Combine that with an element of betrayal, and you've got yourself a powder keg that's ready to blow up the discourse.
Cheating is the kind of topic that inspires a visceral reaction in a lot of people, whether they've been on the receiving end of it or not. Few enjoy the idea that their beloved partner would betray their trust in such a way. Still, it's a pretty common thing to happen. We don't necessarily benefit by not talking about it.
This seemed to be the logic behind a recent viral video, in which a man asked his wife if she'd ever cheat on him. Admitting that she thought it could be possible, her detailed explanation prompted some mixed reactions from Twitter. It's fair to say that a lot of viewers felt like she had hit a nerve.