Nah, you can purchase a substitute for that. Always does exactly what you want it to do too, lol.
I don't know, I have a really slow metabolism because I really don't eat very much. But I'm a stress eater, so even though I'm still not really eating all that much during periods of stress, my weight can really shoot up during those periods. And I'm talking normal stress here, nothing over the top. The stress goes away, the stress eating goes away, the bloody weight remains! Argh! It's a damn sight harder to loose when you get older.