knifekink is when you act up and get a arouse by look-in at thy knife
"I am going a date with this girl." says linda "oh who with?" says eric
"this girl named eno she has knife kink." said linda in a moaning tone
"yes I hope you 2 get marryed!" said eric
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