Why didn't Boa Hancock's attack affect Luffy?


Why didn't Boa Hancocks attack convert Luffy to stone?  
It didn't look like he used Haki or something which would nullify the effect!  
Is there any possible explanation for it?  

![Boa attacking Luffy](https://i.stack.imgur.com/zsbe2.png)




From the One Piece wiki page on [Mero Mero no
Mi](http://onepiece.wikia.com/wiki/Mero_Mero_no_Mi) (Hancock's Devil's Fruit):

> The Mero Mero no Mi is a Paramecia-type Devil Fruit that allows a range of
> attacks which **use emotions of lust or perversion** to transform opponents
> into stone.

Luffy did not have any lustful feelings towards Hancock, so her Mero Mero
Mellow attack had no effect on him.




From the One Piece wiki page on [Mero Mero no
Mi](http://onepiece.wikia.com/wiki/Mero_Mero_no_Mi) (Hancock's Devil's Fruit):

> The Mero Mero no Mi is a Paramecia-type Devil Fruit that allows a range of
> attacks which **use emotions of lust or perversion** to transform opponents
> into stone.

Luffy did not have any lustful feelings towards Hancock, so her Mero Mero
Mellow attack had no effect on him.

