It happens all the time: One minute she’s the midriff-baring high-school tramp gleefully haunting the dreams of a million frustrated teenage boys…and then, what feels like only moments later, she’s willingly stepping out in public with a white-trash hip-hop fan.

No, for once we’re not talking about walking train wreck Britney Spears. This time, former “American Beauty” star Mena Suvari has taken up with…wait for it…a professional breakdancer.

Which begs the question: Do they even have those anymore? I mean, is there really that much pent-up breakdancing demand left over from the ‘80s that guys can actually earn a living off a few well-executed worms?

Apparently so, as Mena met her breakdancing beau, 23-year-old Mike “Murda” Carrasco, at “Battle of the Year” — which main man Murda helpfully described as being “like the World Cup of breakdancing.”

Which then begs the question: What, exactly, was Mena Suvari doing hanging out at the World Cup of breakdancing…other than trolling for white-trash hip-hop fans?