But these are people who seem to regularly have sex, spend all their time together, don't look at anyone else, yet still feel the need to feel its a big deal to declare they are exclusiveReally? Sounds the same to me How is it really different from being in a relationship? If you're not casually seeing each other and you're not interested in anyone else, surely you're in a relationship at that stage?
I've been with my partner 15 years. Tonight I might tell him I think I'd like us to be exclusive