I find the “No kissing” rule interesting, too.
Many people might think sucking dick is more intimate than kissing, but I disagree. What you see from a kiss is so much more than what you see during oral sex.
I still see a kiss as been the trigger for my transformation from “I’m a straight guy looking for a blow job” to a gay guy.
When you kiss, you’re eye to eye, a window into the soul. The passion you can express is so much greater in a kiss.
Sex without kissing, for me, is like eating one Oreo in a sleeve of cookies. It’s good, but I want to eat every Oreo in the package, and I’m not really satisfied if I don’t.