Well I think it might have to do with what the jealous person feels they have lost - especially if it they have been wronged by the person they resent.

But I think there are legitimate times for jealousy..

This story is but an example of the consistent gros difference of parenting between my brother and I.

One Christmas I got a skate board with the $16.99 sales tag still attached. My brother got a complete set of new hockey equipment in addition to outdoor equipment including tent, camping gear, and fishing tackle.

I think jealousy is an appropriate emotion in this case.

Being the only kid in highschool not to have a car? I think jealousy is appropriate in this case.

Having a 7am bedtime in grade 12? I think jealousy is appropriate in this case...