Friend With Benefits

This cute little 23 year old hispanic girl I work with told me she wanted me to be her “Friend with benefits”, I thought she was joking, turns out she’s serious, I’m flattered, just not sure on what i should do.  Of course all my guy friends tell me I should take her up on that, and me personally, well being the way i am, I would gladly do that, but then again I know I shouldn’t, right…?  yea I shouldn’t.