A person who is is attracted to the face or the concept of danger. It doesn't matter that the danger is life-threatening, the person willstill be aroused or attracted by it.
Adelina explains to Lyra carefully about her friend.
"Look, Jeremy is more like a Dangersexual, because he has a tendancy to date dangerous people, myself included"
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi