Relationships are work because sometimes you have to make compromises or sacrifices in order to keep it going. I would argue that relationships of any type can be work. The work has to happen when something angers or annoys you about the other person or you have a fight. It's work to get past these issues. Of course, the relationship has to be valuable enough for you to be willing to go through this.
I see what you mean but I wonder if there would be less of a strain to maintain a romantic relationship if people were not expected to maintain one romantic relationship alone for the rest of their lives. I don't usually hear friendships described as being 'work' in the same way. I'm not criticizing monogamy, just 'wondering'. I've heard polyamorous people say that their relationships require a lot of work and I've always wondered why it was so 'complicated'.
I'm hesitant to answer your last question, because your other posts have indicated that you already have opinions about how humans so go about sexual interaction. I can only speak for myself. I like monogamy and stable companionship. Despite the initial work, I would absolutely love to live with my boyfriend someday. Clearly, you are different from me, so, do whatever is right for you. Monogamous, marital relationships are an institution, so that's why most people seem to go about the same pattern. By all means, if you don't want to govern your life that way, don't! Just don't go about saying your way is somehow superior or more natural than others' ways.
You are right, what works well for some people doesn't work well for everyone else. Both monogamy and polygamy are 'natural'.
I like living by myself, I don't know if that will ever change but even with my feelings about monogamy, I would never consider a group marriage. I'm not that sociable, lol. That's not right or wrong, it's just my personality.
The difference between a friend, and a lover, is that drive and desire to touch them or be near them, not necessarily in a dirty way, but that tingly and just, instant happy feeling when your around them. I love my friends, and I love my former lovers, but it's just a totally different connection.
I have amazingly close friends but it is not the same as with hubby (Even if you remove the sexual side of things).
I can't tell either of you how you feel but I'm still curious as to what exactly distinguishes a romantic relationship from a platonic one, beyond the sexual intimacy. You can pet a cat, hug a relative and tongue-kiss a S.O but aren't all of these actions just different ways to express affection (I was going to mention cuddling for the S.O but you can actually do that with a cat, small dog, child etc.)? What, besides physical attraction, separates romantic affection from platonic affection (and I'm not denying that there really is something beyond the sexual/physical component that separates the two).
It's all to do with pheromones my friend.
Whether or not people "should" live monogamously or polygamously is a matter of personal preference but now you've made a scientific statement. What phereomones (beyond the sex related ones), specifically, distinguish romantic love from platonic love?