I Hate the Male Metobolism

So the hubs and I started a different eating regimen on Saturday. He's doing it to support me and also because he needs to lose a little. I'm doing it because I need to wear a bridesmaid dress next Sunday and it is not a pretty picture right now. So yesterday, 4 days into this thing, we weigh ourselves. I have lost 5 lbs. He has lost 13 lbs. Boys suck.