Mostly the “every night” part. There are only about 6 days a month when women can get pregnant iirc. And unless she’s getting a random train of dudes, there’s pretty significant diminishing returns on repeated loads (not that they hurt, mind you). It’s just kind of a childish comparison.
Responded above but mostly the “every night” bit. That’s not how cycles work. Not saying a woman can’t be getting constant creampies but that’s not exactly automatic when someone is trying for a baby.