Because males tend to be the more stupid of their species.

[Another sip of wine, accompanied by a very pointed look.]

But from a biological standpoint, a siren's call works just as fine on either sex. I just got the taste for it after all those years of all-male crews.

[She's not sure why she's bothering to give him the small biology lesson on sirens, but it's making his face do this stupid, what she has to assume to is a "pleased" look, so it's...amusing, at very least.]

I take it your long-dead relatives were not as keen on their own advice. Define "precious."