The numbers question might get asked a lot too, but in my experience, questions like that tend to come up in light-hearted fashion when you're already in there with someone, and it would take a really out-there response for it to have any impact on the relationship at that point
Are you kidding? Have you seen how many threads get started in this particular forum alone (never mind the hundreds of other ones out there) where a man has fallen in love, thinks the girl is perfect for him but wants to break up with her because her promiscuous past is something he can NOT wrap his lizard brain around and the OCD thinking on it is ruining the bond? The brain he has that has not yet evolved from the days of men can have many to spread their seed but woman should not because she needs to be discerning.
IMO If a guy is gonna ask the OP for a number and she dismisses it on discretionary grounds, and the guy refuses to let it go until he gets a number that he is satisfied with, that should be her red flag.
Exactly why I recommend she get that conversation out there early.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion