Think your Core professor is kinda handsome, a little brawny and slightly bird-like? Well, he may just be Batman -- and he may just be after you.

This afternoon a so-called Crimson professor signed onto Craigslist to sell a snowboard and took a little detour into the M4W to make a little naughty. "I’m a professor at Harvard, 35, fit and funny," he writes. "Or at least, according to my opinionated students."

Hott. In case you're into naughty roleplay, don't get yourself excited over the "hot professor / disobedient student" bit. This professor's role of choice is a certain brooding possibly-homosexual high-flying crime fighter from Gotham City -- and it looks like he's willing to offer one lucky "Batgirl" more than a few rides in his batmobile. Or maybe even an A.

Lest you begin to write those fake replies with pictures of a topless Batgirl attached to find out who it is, Batman has already warned against any phony crimson students from responding: "I will find a way to make your life a living hell," he says. "How sad would you be then?"

Almost as sad as you, President Faust . . . I mean "Batman."