When I was younger I worked at A LOT of weddings (enough to put me off ever getting married), and I can tell you no one ever has sex on their wedding day! 🤣
When the bride and groom disappear it's usually to get photos with each other, then more photos with family, bridesmaids, groomsmen etc. Then if you're lucky a quick drink, freshen-up, toilet break (half-hour gone right there), make-up and hair check etc etc.
So while it looks like they disappear to the guests, I can assure you there's no time for funny business when you're stuck in a wedding dress, you've had your makeup done and it takes two hours to do your hair!
The rest of the night is about stressing over the little things... why isn't the cake out yet?! I can't believe this person wore white! Aunty Beryl's meal wasn't gluten free! The best man is too drunk! etc etc.
When you finally get some time to yourself at 1am you need to undress (good luck), and all you can think about is showering and going to bed. Even if you've been waiting for this moment all your life, I can assure you your new husband is not gonna get it up at 2am after a day full of stress and drinking!
Sorry to shatter the illusion but weddings are not romantic events! That's what honeymoons are for. ;-)