You know that feeling you get when you eat something really hot and spicy (in my case, potato chips)? And your eyes start to water, and your nose gets runny and you produce a large amount of saliva?
But then you don't stop because it tastes so good.

It's kind of weird how we - or in this case, I - torture myself for pleasure. It's like stabbing yourself, knowing it hurts like a bitch, but you did it because you can't resist the smell of blood.
Okay, not such a good example, but you get me.

Maybe it's part of human psychology that we do this.