would that work if a man had sex with his own wife 21 times ???
Oops, you beat me to it...I didn’t see your post till just now...muh bad...
Yes, if you call her by a different name each time..............
Maybe not, because of the "excitement" factor -- something that might influence the amount of seminal fluid ejaculated by the prostate.
Just a theory, however. Not speaking from any personal experience!
Don't let women see this; they start getting "headaches" soon enough, without putting a lower limit on yesses.
"Sorry, Dear; you've reached your 21 lifetime limit; now go to sleep; I'm tired."