Customers at the Qdoba Mexican Grill at 523 Fellsway can get free food on Thursday, if they don't mind a little PDA.

The nationwide restaurant chain is now in its third year of a special Valentine's Day promotion: "Buy one entree, share a smooch with someone special -- or someone willing -- and get a second entree for free," says Qdoba.

All kissing has to happen at the cash register, and no coupon is necessary. The promotion is happening nationwide.

And this year, there's even a new twist to the promotion -- the Qdoba Kiss Cam.

Snap a pic of the moment and share it via Instagram, Twitter or Facebook and you'll have a shot at winning one of three prizes, including free burritos for a year.

The deadline to submit your photo is midnight on Feb. 17. The winners will be announced Feb. 18.

The Medford Qdoba is open from 11 a.m. to 10 p.m.