I think if you're in a committed relationship unless you have some sort of an understanding monogamy is something that should exist.
Human nature is such that monogamy is a really hard thing to achieve.
Straight couples don't have to be monogamous to be married or married to be monogamous. Monogamy no more defines marriage than the presence of children does. Monogamy isn't compulsory and its absence doesn't invalidate a marriage.
Marriage requires a special talent like acting. Monogamy requires genius.
I have a lot of skepticism about marriage and monogamy.
I think serial monogamy says it all.
I was always anti-marriage. I didn't understand monogamy. I couldn't figure out how that could last. And then I met Bryn and I started to understand the beauty of constancy and history and change and going on the roller coaster with someone - of having a partner in life.