You know your son needs a playdate with a BOY when.....

a) Given the chance to select any sticker from a basket of stickers he picks the pink princessy one;

b) You regularly hear him singing the "I'm a Barbie Girl in a Barbie World" song when he's happy;

c) You find out your one of your daughters (read, Caroline) has taught him how to go "MAN STYLE" on the potty.  And then, you find out "Man Style" means peeing stark naked, sitting backwards on the potty facing the wall.

d) All of the Above.

Answer:  D -- Call any other young boy immediately.