After decades of "practice", I feel like I'm still learning how to perform oral sex on a woman.
My blowjob skills are truly outstanding — on a par with almost everything I've seen in porn — but I only get to practice them on dildos lately.
I think blowjobs are easier for me because I know
pretty much exactly what the receiver is feeling. I feel like I'm continually getting a better and better idea of what my wife likes, but it's not nearly as intuitive. Fortunately, it's a lot of fun to practice.