hey guys, i have a theory about luffy's mother, this is only my opinion so its up to you if you will accept it as good or not. Monkey the dragon and gol d roger are connected..and monkey the dragon was the previous member of roger crew..I think Monkey the dragon is female during those times..dragon and roger had a child and that is luffy. when roger died dragon ask ivankov to change her gender to male to protect luffy..thats why dragon had a tatoo on his face that is a symbol of her love to roger..some people get a tatoo when his/her love ones died. Come to think of it.. That is my opinion.. Sorry for bad english!