Talk:Kon Kon no Mi/@comment-21119641-20170405155947/@comment-4869113-20170405175335

I'd imagine the devil fruits acquisition of hearts is akin to the phrase, "his heart was consumed by malice." Devil fruits are symbolic, which can lead to literal effects, so he can steal others hearts and Don them. The pain thing is probably because these hearts are consumed in malice, they know nothing else. Sadness, excitement, pain, it doesn't affect them. Only thing that they feel are malice.