So, there's this thing called reactance. If you're like most people, you've probably never heard of it, and yet it has huge implications for your life.
Reactance is a psychological phenomenon -- in response to loss of a freedom, loss of choice, or a perceived loss of freedom/choice, people are quite likely to feel psychological reactance.
Psychological reactance makes you want to push back against the new restrictions, to fight and combat them, to reassert yourself and control over your world.
This can be in the form of direct resistance or pushback against the loss of freedom, and increased desire for the prohibited action.
But it does a lot of other things, too. Reactance causes people to like and enjoy whatever their threatened freedom is more than they liked it in the past, often permanently. Reactance causes people to want to reestablish freedom/control through similar types of behavior -- like increased eating of junkfood in response to being prohibited from drinking alcohol.
Reactance also generates hostility, making people dislike the person or institution perceived as causing the loss of freedom.
What's that mean for your life?
So. If one of your freedoms or abilities is threatened, you'll (1) start to like and want to do it more, (2) immediately wish to push back and reassert that freedom or ability, (3) feel motivated and compelled to do similar types of behavior, (4) dislike whoever/whatever you perceived imposed the restriction on you...
...therefore, your preferences and behavior are incredibly likely to be altered. And since we live in a world with opportunity cost, succumbing to psychological reactance can cause you to make worse, irrational decisions towards doing stuff that doesn't please or serve you!
Oh, and it gets worse.
If you're trying to help and guide people (perhaps as a manager, boss, or mentor), then you've got to be damn careful you don't trigger psychological reactance. Maybe someone you care about is doing something boneheaded and self-destructive, but they're going to feel aggression/dislike for you, and increased desire for it if you try to curtail it.
And it gets worse!
If you're working against a vampiric influence on someone, like a friend who falls in love with a prostitute, any attempt to sever such vampiric influences is likely to generate that same aggression, and increased feelings of desire (that might even become permanent).
(Call it a Romeo and Juliet thing.)
Does it get better?
An interesting phenomenon of psychological reactance is that most people seem to be unaware of it. There's tons of empirical evidence for the effect, but the majority of people don't realize it has a huge effect on their preferences.
...rather, they just want to do things, unaware of why.
But! But! Good news!
Awareness of psychological reactance can lead to diminished effect on you.
*You can stop falling for "just one more model" at car dealerships. (Loss of ability to buy == reactance. But really, there's another version of similar make and model somewhere.)
*Going-out-of-business sales don't have to compel you. (Some jurisdictions actually regulate against having furniture stores announcing a going out of business sale if they're not really -- furniture stores actually command higher prices at higher volume during these faux sales... don't buy into it.)
*Be very careful of telling someone not to do something. "Hey, you do whatever you want, I'm pointing out some consequences because I care about you, but it's your own call." (Careful with that too. Nothing's perfect here.)
*If you catch yourself chasing something forbidden or restricted, ask, "Is there anything unsexy but better for my life I'm neglecting?" (This doesn't work great, but helps.)
*If you find yourself facing restriction in one area of your life, voluntary or not, be vigilant that you might want to act out in similar ways without realizing where the motivation comes from.
*Likewise, if you're facing restriction in one area of your life, you might pick a healthy designated outlet that's somewhat similar. Try getting a stack of great philosophical comic books if you're quitting internet distraction addiction as a transition point. (Check out Frank Miller's Dark Knight Returns or the entire brilliant Lone Wolf and Cub series.)