Men who care about that shit are weak and insecure. Strong women don't want them anyhow. I've been with my man for 35 happy years. Ten years ago we opened up our relationship at my suggestion and it's only increased our love and intimacy. We're both happier than ever before. If you want to be monogamous, that's fine, but this type of dismissive patriarchal bullshit is lame and passé.