My girlfriend wants me to treat her badly?

Me and my girlfriend have been going out for about a month, ive been exceptionally great to her, id do anything for her. recently she told me that her last bf treated her like ****, and thats why she was with him so long. and our relationship has taken a toll recently and were not as close as i would like. but anyways, the point being: she told me that if i treat her badly (call her names, be a dick to her) that she would love me more. thats not the way i am. what should i do? i love her to death, i dont want to lose her, but i dont want to feel like ill lose her if i be a bad guy