Behold, the key to knowing whether or not an individual at a fraternity party has an STD is within reach.

All it takes is a bit of courage (for the approach, I suggest recruiting a wing(wo)man) to ask the following deceptively benign question: “What is your major?”

That’s right; armed with the knowledge of a person’s field of study, you’ll have a good indication of whether or not they’ve been around—at least, that's the implied takeaway from this study conducted by Counterpoint Magazine at Wellesley College.

Based on the diagram above, if you’re into anthropology, chances are you’re not a virgin, and your nether regions are likely infested.

Case in point: Bones, an anthropologist, from the television series “Bones.”

On the opposite end of the spectrum, however, are mathematics majors.

Case in point: These fine specimen…

Then again, I think the pocket protector is a good physical indicator.