@realcaseyrollins Yea thats true. but even then I'd hope you want to be explicit... "Hey you wanna go on a date" doesnt convey the same message, even to most christians as "Hey, do you want to be exclusive".
While you might be quite strict and assume the two are the same for the overwhelming majority of Christians you date someone, usually for some time, before becoming "exclusive".
So if you have a partner, even a christian one, a phrase like "monogamous" still holds more value since it is clear and explicit in what it means.