I would say my experience has 100% got weirder over time - my last meets included watersports, both ways, anal, deep face fucking, dom & sub play and all of these were later additions to the booking. Certainly wasn't something I was ready to explore at the start of my punting, but years later it's a feature that I look for. I enjoy spitting, or having my cock spat on, but not in my mouth
I think it's just the ability to explore when you are making a booking, I tend to look for a sub, a real sub not the ones that say they are but don't really seem to enjoy it. This is the fun of a punt, trying things you wouldn't normally do