The colours are massively too bright and clashing and look like sprayed photoshop brushes. As a straight female, no I wouldn't wear it. As a straight female, I would be turned off by a guy in a shirt proclaiming he is a chick magnet. I like the font used for "chick" The little creature is cute, but I would take off his glowing eyes.
In fact, I think it would be a much nicer shirt if it was just a print of the bunny thing. If you look around, people often like to wear simpler designs.
The "I am a chick magnet" font doesn't look right for a shirt, I think you should use a different font. I also agree with the other comments about being redundant, as well as the odd face on the front. I also think it is too bright. And I don't know if high school guys would wear a shirt that proclaims they are a chick magnet. I mean... if they have to tell people they are with a shirt, then... they probably really aren't.