It’s not because we are all horny AF, though that could be the reason for some of you. But for others, including myself, it’s like this:
CS is the relationship that made some of us believe in finding someone and having it feel just like a fairytale, no matter how bad things get. For some of us, we base our idea of the perfect relationship on this gloriously imperfect and complicated couple
We’ve seen a lot. Their first kiss, first date, first couple fight, first “I love you”’s, and when they agreed to move in together. Yet we still want to see even more. Why? Because when we are watching them, we are essentially watching the relationship we hope to have, and when CS has some sort of progression off screen, we get upset, we feel cheated. Because it feels like the writers are making us skip moments of our own relationship
Any sort of romantic relationship has a a sexual theme to it, even if none of the people in the relationship are interested in sex at all! In a relationship, sex is kind of a big deal, if the people in the relationship choose to have it with each other, and we want to see the aftermath of first time together because we want to see the entirety of our ideal relationship, and skipping details is like giving someone half an instruction manual. Even if we never get the X rated version, the “have they had coffee yet?” is important because having sex with your partner is something we all want to know if we’ve done yet, and we want to see our relationship role models react to having shared that sort of intimacy