Most Helpful Guy
Someone who want to use an throw an virgin or someone who prefer an first hand girl? the kind of virgin chaser you should watching for the most are womanizers, and the why to spot them is if you sow a guy who on one hand behave in an unrestrained manner and on the other hand seeking for virgins.
Most Helpful Girl
If he wants to know your sexual relationship history early and seems really into your virginity, that's a sign to be watchful. I'd flip the tables by asking him whether or not all his previous partners have been virgins and what he thinks about taking a woman's virginity.
Some guys are into it without wasting to dump you right away, but... There's probably something strange behind being really into it.
I'd wait until you're with someone you trust better than needing to ask this. :-/ I don't think you'll regret being certain.