Do you think some people just put on weight easier than others?

[lovetochat]

I mean, I know it is just calories in versus energy used, but a friend of mine just seems to look at food to put on weight. She doesn't seem to eat so much and honestly, I would need to eat bad food all day and all night to put on weight as quick as her. It makes me feels so guilty when she tells me her weight problems and I just can't understand how she can put it on so quick. Must she have a secret really bad diet or is it just unfortunate genes?