OK,,heres wat my biology teachr says.  in nature males r attacted to females that r the most healthy cuz then their babies hav the best chance to live..  in human ppl she says mothers that r like real overwieght get diabetes when theyr pregnent an have babies that r overweigtht to, an then the baby can get brain damage. the blood sugar in the babys blood is a problem. so she says guys r attracted to gurls that r healthy weight .. anyways thats all i kno...