later on in life, after getting some more experience & calming down a bit re: girls, I found myself actually able to be present and focus on what was happening during a kiss; how I was holding my jaw, how I was forcing my lips to do certain things, and learned to relax and let go
this, naturally, lead to much better results, as I was no longer telegraphing "I am nervous and uncomfortable and am following a physical script I made up without your input"
some people never really move past this stage, which is unfortunate
luckily it's like any partner skill