Smoking
If you smoke, you've probably already heard numerous bad things about smoking and don't really give a damm about the consequences. So ignoring the minor issues such as ruining your lungs and causing cancer, I'll be informing you about the real reason you should stop smoking.
Smoking absolutely ruins pcs. In order to keep your, definitely not gay, rgb decked out pc fresh, you need to avoid smoking and smokers at all costs. Otherwise you'll end up with a pc covered all over in filth and blocking all the rainbow lights.