What is the least suggestive way to ask a girl if they're a virgin?

I've been seeing this girl, but she's quite a few years younger than me. I'm 24 and she's 18. We're just seeing each other, but whether it goes anywhere depends on a question of maturity, this is not a question of how far I can get with a girl. I am definitely not a virgin and am far from innocent. I don't want to corrupt this girl because she sounds like a virgin. Whether she is or not, I still like her, but if we end up dating, eventually I'm going to want to have . I don't want to end up in a situation where I ask her for and then find out she's never done it with her, because I'd feel like I'm corrupting a child.