I didn't know I was such a masochist until I came to law school.
Getting only two hours of sleep for five consecutive days,
being called on in class and answering the prof's questions until she squeezes all the juice out of your brain,
carrying three to four books that weigh on average more than a kilo,
having not much else to talk about with friends other than cases and legal concepts (or relating everything to what we learned in class),
virtually no social life,
the prospect of not being able to watch a single movie for a stretch of perhaps four months,
no exercise (unless I walk to and from school),
and paying $50,000+ per year just to do this.
As horrible as this will sound,
This is SO. MUCH. FUN.
If you think you are a pretty hardcore masochist, you should give law school a shot.