The ironic thing is that pink = girl / blue = boy thing is flip flopped from history.
Pink and light blue are diminutives of their primaries, red and blue.
If youre at all up on your Greco-Roman associations, Red is masculine as it is the color for Mars and war. Blue is feminine as it is the color of the sea, itself representative of Venus, who was associated with sex, fertility and prosperity.
These associations stood until the 1800s or so.
I dont dislike pink at all and dont begrudge anyone who enjoys it. Its a great color! As I type this Im wearing an obnoxious amount of it in fact (YAY! Pajamas at noon!). I just happen to be slightly in lust with most things purple. For outdoorsy stuff, if its not natural earth tones - make mine purple please! Im actually trying to work up the nerve to hit my AKs furniture with a coat or three of Plum Krylon Fusion paint.