
This made me curious so I actually looked into it a bit. 'Nuts' has been slang for testicles for at least a hundred years, "bust a nut" as slang for orgasm started around WWII or a bit afterwards, "nutted" as slang for orgasm was 1990, and "nut" as slang for semen itself was not long after that, sometime in the mid to late 90s.