Cuticle picking/chewing

I have been chewing on my cuticles since I can remember. Everyone I know makes fun of me for it.... I don't care. People always try to give me ideas of how to stop... put "no thumb suck" stuff on my fingers. Well I tried that in like Jr. Hgh and I just dealt with the nasty taste. I can't stop. Well I have 2 kids... my daughter is 5 and my son is 3. They both do this obsessivly like I do. My husband thinks it's gross... which really it is. I believed this was due to stress.. but now..my kids. Geez arent they too young for this to start. It's crazy and we need to stop. Any ideas?