For women or men?
Women: Whatever position Mahmoud Ahmadinejad is in
Men: professional porn (straight).
1) The competition int hat industry is INTENSE
2) The pay for most jobs is ****.
3) You have to be able to...um.....do everything on demading, coming, erections, everything...with like a few seconds notice sometime
4) You have to keep it up in front of about 5-6 fat A/V nerds who are filiming you.
5) Unless You're ron jeremy or a select few others, once you hit 30 or 35 your career is done
6) You're practically unemployable afterwards
7) Relationships are a bitch if you in porn industry
8) As said, to become a tru pro porn star and not just n amateur, you need connections, a big ****, incredible self control, a hell of alot of luck, and many other things.