Self-forbidden

Is the self- forbidden fruit less alluring then if it was just forbidden? 

Maybe it's even more. 

Would it taste sweeter? 

I think it would be rather bitter.

Knowingly forbidding ourself something is usually caused by some important factors. Going against it would cause not only guilt and regret but also an internal crack. While tasting fruit forbade by someone might cause a lot of satisfaction and might bring revelation as to why it was banned self- forbidding lacks those. 

So why do we break the rules we come up with?