Is there a term for wanting to only be sexually, and not romantically, open?

Hello! I am trying to find answers to my relationship preferences and thought you could help out! I have discovered that I prefer to be romantically and sexually involved with one person (my boyfriend) and only sexually involved with other people. Is there a term for this?

Whoever is responsible for this recent obsession with whether there is a specific term for something owes me a drink. And I don’t even drink.

To my knowledge, there is no specific noun or identity term you can use to say “I am a [person with these preferences].” You’re welcome to make one up that suits you, or combine existing concepts, but you have such a good handle on it already, you’re fine.

You know exactly what you want, and you articulated it pretty clearly here - so you don’t actually need a term for this, you can just be you!

However, you might be interested in the following concepts: open relationships, swinging, and hierarchical polyamory.