I quite agree. Vital to know these things. Marrying someone like that would have been a death sentence for me. My own techniques during my single era (back in the Stone Age, so mercifully pre-apps) were to not date at all if possible (not always possible), but rather observe potential girlfriends by getting to know them as friends first. That way I knew I wasn't getting the "sales pitch" version of their personas via the dating thing. Whenever I did go on conventional dates, they were often disastrous in any case, but that's another story.