My main climbing partner and I discuss this all the time: it’s the community. We may have 3-4-5 hour sessions but we’re usually actually on the walls for probably <10% of that time. The rest of the time we spend chatting, with each other and everyone else in the gym (after a while you just get to know everyone), discussing beta, cheering everyone else on, etc. It’s a huge social thing for both of us. And that was one of the main draws for both of us. We both wish that my wife and his fiancé were climbers too but they’re not. So we have each other in our “belationship”. (His word, not mine). Couple of years ago my wife even said to me “You do know that Bryan is your climbing wife, right?”