Is it a new relationship or have they been together for awhile?

I would call that a temporary position which will either evolve into a committed relationship or end/become un-monogamous in time.

It's a 'lets give this a go and see where we wind up' position, but not stable in its current form.

Not really that casual. But also, kinda awesome. Like go away, I only want to see you once or twice a month, but when I do, we have mindblowing sex, great conversation, and then go back to our lives, while neither of us is out getting STDs to pass on to the other next time. I could do that.

Exclusive companionship is what I had for almost 2 years.

Not my cup of tea. But I don't do monogamy or casual. To each their own.

I would call it my kind of relationship. That has been what most of my relationships have been, what I prefer and still look for to this day.

Being exclusive does not mean a committed relationship. You are not sleeping with other people.

For three years, I jokingly called a man "my f-ck buddy." Neither of us were sleeping with anyone else. To my surprise, he asked me to marry him. Although he was an extraordinary lover, I don't consider him marriage material.

It sounds like it's not casual.

Not too casual .

Surely that’s a contradiction? If the relationship requires monogamy then it is not, by definition, casual. Sounds like one party wants to have their cake and eat it.

Nothing based in reality.

A really good idea if that's what you both want and agreed on.

Does it need a title so long as both parties understand it?

Marriage is unatural. I researched years ago about it as a Reproductive Health Educator out of Chicago, my first occupation out of College. I recall that a judge and an attorney came up with this thing called marriage all in the name of $$$. They knew that the average couple would remain together for only a few years and part ways. Think about it; to to go hire a stranger , a lawyer and pay big money to part ways in front of another stranger called a judge, is big BUSINESS! When I speak of unatural, it’s something man made. Marriage doesn’t grow on trees or originate from seeds. What’s natural? Examples are: sex, eating, bowel moment, speaking, breathing, emotions, walking, seeing, etc. What are your thoughts about humans being monogamous or polygamous; marriage being natural or unnatural?
RawLuv

"I get a little bit 'Genghis Khan'
"Don't want you to get it on
"With nobody else but meeeeeee..."

"Exclusive FWB". Someone wants STD-free sex without heavy feels. Something I once wanted in my life. Couldn't find a guy who didn't want the feels. Ugh. Humans.

How casual is anything that has expectations of exclusivity? Christian Dating?

A monogamous casual relationship?

"Casual sex" defined by Urban Dictionary:

Having sexual contact with another person with no plans on furthering a long term/committed relationship with that person.

I had casual sex with him/her because I needed sexual gratification and nothing more.
by hmm February 06, 2004

Romantic illusion

From years of experience I'd call it marriage.

A relationship "To be mutually expected not to label and possibly to keep private between the two". It's a silent voice against the social norms, it's a position of certainty through some uncertainty, unidentifiability, it's a position of less friction, minimum restriction and if executed educatedly and mindfully, a total freedom and pure love, which doesn't draw any obligation, as not required between two trustworthy, responsible and sensible adults. But if not done properly, it can be a control freak show and manipulation and humiliation.

I've never heard of it and don't think it has a term.

I would have to say though that if I was interested in a person enough to want them to be monogamous, I'd probably want something more than casual.

Odd way to look at things. Casual to the person who said this must mean we get it on when we get it on and when apart there's no messing around. Weird oxymoron there. I think that 'casual' to most people means 'no restrictions', yet the 'monogamous' part is a restriction.

A relationship. Every relationship should be discussed and you should both have an understanding of the expectations and be able to agree on them. If you don't, it's not a relationship yet, just a negotiation.

I would call it non-committal. If you’re cool with that, so be it. If you’re not, time to move on.