Wasn’t it technically true? Except the test levels off naturally after a while if you don’t so there’s no real difference except maybe your lifts will be better for a few days a week after your last ejaculation or something?

Idk about semen retention though, I just mean the testosterone peak that comes after about a week of abstinence.

Personally I have a very high sex drive, so if I’m not having sex for a week, I’m better off masturbating at least once because otherwise I just become a nasty fiend and can’t look at my wife without an erection.