I was ignorant.
Fortunately, a sugar babe (my second such relationship) opened my eyes. She knew more about sex than I did. (My knowledge consisted of knowing I needed sex).
This is about 20 years ago now. She was going down on me for several minutes, then licked down the shaft and didn't stop. The sucking on the balls combined with some deft pumping produced, for the first and only time an orgasm that I wasn't expecting. I wasn't in control and just lost it.
That became part of our routine.
Ever since, I want/need my balls to be played with/sucked on.
At massage parlours I've joked with girls that I'm going to put some superglue on my balls so that their hands will be stuck there.
I don't understand it when you tell a girl to massage them with one hand while pumping with the other why some only do this for a minute. The practice should be de rigeur for the entire session.
Of course it takes some talent. The balls aren't an area for playing rough. But most massage attendants catch on pretty quick. Still - my vote is that there is no such thing as a proper finish without the balls being squeezed for what they are worth.
I owe that girl from twenty years ago a lot. She taught me much.