The man report: guys' heads are hard to crack. So Cosmo editor Ky Henderson offers some insight into his baffling gender.(MAN MANUAL)

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THE CHECKLIST

Is his female friend a threat to you?

For every yes you check, there's a greater chance his platonic buddy may evolve into a very different kind of buddy.

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YES                                                 NO 
 
[]        He gets into fights with her.             [] 
 
[]   When you're together, she makes no attempt 
            to befriend you separately. 
 
[]   She frequently references events you weren't   [] 
     a part of and makes inside jokes you have no 
                chance of getting. 
 
[]      You find out he told her about something    [] 
        significant--positive or negative--before 
                he told you about it. 
 
[]      He suddenly becomes extremely jealous of    [] 
                   your male friends. 
 
SOURCE: DEBBIE MAGIDS, PHD, COAUTHOR OF ALL THE 
GOOD ONES AREN'T TAKEN DUMB ADVICE YOUR GUY IS GETTING 

DUMB ADVICE YOUR GUY IS GETTING