My husband got used to wanking daily when he was younger and so normally produced a very modest amount of ejaculate, not a terrible thing as less clean up to do!
The last year or so he has really the reduced how often he masturbates on his own and I have definitely seen an increase in how much volume he cums now.
Like many others, I got used to porn and masturbating every day for years. I have cut back on this and try and wait in between sessions with my wife. She is very happy about this but has told me many times that she is only too happy to wank me in between anytime I need it. She is definitely a keeper!
I would agree with most people on here that 4-5 days is probably the largest volume and shoots the furthest. I don’t really see bigger loads after this time. But it does get more sensitive the longer I leave it and less stokes are needed to shoot out a load!