So as a girl who is a virgin and waiting until marriage, I would not be okay with a guy asking me this. Especially before a first date. I understand your preference, but this would put a bad taste in my mouth. I wouldn’t like if a guy determined if he wanted to date me based on my sexual past. Get to know her first, ask reasonable questions. Then, if the topic comes up, then you can ask. Also, I wouldn’t ever confess that I’m a virgin on a first date let alone before a date.
No on the asking before a first date in general. You also shouldn’t ask if a girl is a virgin or not, because, let’s be honest, you’re looking for one answer and if it’s the other you’re gonna be put off. If that’s such a big deal for you, then you probably aren’t ready for a relationship. Discussing intimacy details and preferences is good, doing it before anything happens between you two helps get over some awkwardness, but it shouldn’t be discussed until you’re well into the relationship.
Well one it’s a very weird and strange question in general. It’s a random stranger asking about your sex life. That’s not comfortable. Two, I think valuing virginity so highly you ask it before the first date is proof of character. A lot of men my friends have met had a kink about taking someone virginity, it’s just gross. Three it shows that you immediately think of sex and see it as so important you talk about it so soon. All of which is a turn off.