It either means that he is extremely fit and charming or that he is having secret relationships with all of them, and none of them realize that he is also having relations with the others.
It means they all think he is attractive or he flirts very well with them and they blush from embarrassment or excitement.
They have probably been discussing intimate stories about him among each other while no one else is around.
They love him
They love you WAAAY TOO MUCH
It means that the guy is cute and the girls wish to be with him
He's the ultimate hunk
They love you, date them as much as possible
They want the sex! give it to em or else.
they are just impressed by his age. they can't date younger or older he must be really really really cute
Have you had your eyesight checked lately. It is so highly unlikely that all college and university girls would blush, much less for the same thing (or person), it could be described as 'never going to happen'. You are obviously focusing on a limited number or type of girls. I know more girls of that age that would never be inclined to blush at any guy than would; they're just not that easily impressed. They actually have bigger ideas about life.
He's either the utimate hunk, or they know something "special" about him that's embarassing to them.
It means u have a gift
Check your fly.
They think your cute