Pornography In Day 2 Day Life

I think its for various reasons.
1) Some people feels lonely (especially those whom are single) and they needed some excitement in their sex life.
2) For extra general knowledge
3) Curiosity
4) To enhance their sex life
5) Some people just love watching it. Its like a Hobby for them.
6) Cause they are bored and have nothing else better to do.

I'm actually not sure as I've never watch one yet.