Do you want to be my sister?

Found a strange message today on OKCupid. Accompanied by a picture of some struggling abs and no face, I found the following message in my inbox:

Hey, 

How are you? I realize that that this will quite forward but i was just wondering if perhaps you would consider becoming my sister? Just to clarify, this request is sincere so I appreciate you taking this time to read it. I look forward to hearing back from you soon. Take care! 

I was intrigued... So I responded with the following:

Hi, just so that I understand, you're on this site to find a sibling?

I like how he said, "just to clarify" and it clarified nothing.

Yes! Well, this is a very different, unique, unusual, and most importantly open minded thought i had, plus i dont actually have any sisters and i've always wanted one. So as a result i came up with this special sort of relationship where it could be possible to be brother and sister even though we are obviously not blood related. I would NOT want this to be just some online thing and as well, i would want to eventually become extremely close. What do you think? 

Sounds like lyrics to me. Which is kinda nasty cause you'd want me to be like your sister and then you'd try to sleep with me. That would mean you want to sleep with.. your sister? I'm confused. It's possible that he's being sincere but with that being said, the only picture he has up is:

Is that how you try to attract a sibling? I call bullshit and shenanigans. I think he meant to say he's looking for A sister; like a chocolate lady. Lol