It seems that HyunA has a different way in classifying men.
It must have been a trend through Koreans that they have fun through blood type personalities, but it looks like HyunA takes it a lot more seriously than other people!
The girls of 4minute were featured guests on KBS 2TV's 'Guerilla Date' segment and has talked about how they were when they dated. The members opened up, "HyunA classifies all men through their blood types. She even says she's going to write a book on blood types later." They added, "When Gayoon has troubles with men, she (HyunA) usually solves all the problems."
The girls also stated, "If we fight, we talk it out. We talk for a long time until we reach a conclusion, even if we stay up the whole night."