This guy comes close to doing it but not quite and I have to finish it myself. I am not complaining - the orgasms are really high quality this way, much better than what I can get via masturbation, but - I have to participate. Ex H knew how to do it without my assistance. I never taught him - he knew himself. Ex 1st H, too, to a lesser extent, and another very dexterous lover as well.

What gives now? Is it a teachable skill?