Quote Originally Posted by Raven
I just assumed from the start that Boa's powers wouldn't work on Luffy, he seems to be indifferent when it comes to girls, more asexual than anything. Kind of like how Usopp was immune to the negative ghost power.
I have to take a wild guess from the fact that Luffy has seen something he recognizes on Boa's back, and the fact that she looks like him, that she is his mother. Some affair with Dragon many years ago?
You're the second person to say that, but i just can't see the resemblance

Also, doesn't she look kind of young to be his bother?

That said, she would make one hell of a MILF