Yeah I'm so jealous of that ability, which I just don't have!
Last working girl I was with comment on how little cum there was, which was quite embarrassing. She asked me if I masturbated earlier and I said I did as an excuse for my...shortcomings. (Or should that be shortcummings?)
I've since read a few books and articles on the topic. Not obsessing over it or anything, just being interested as I'm a bit of a biohacker and love testing different things out. I've tried tonnes of supplements, kegels, staying well hydrated, etc. and the results are still, well, unglamorous!