In pool do you get 2 shots on a black?

If of course, your opponent has committed a foul, then yes, you do get two shots/visits on the black ball. It would be unfair not to. Why should a player be allowed two shots when they are not on the black and the other player, who is on the black, not. Seem fair? See below for this variation of rules, that people have unofficially changed to suit themselves as there has never been a rule written down EVER about only one shot on the black from a foul.

You only ever have one shot on the black. It's surprising how many people think this variant makes sense. They suggest that having 2 shots on the black makes it too easy for the person who's on the black. Actually their variant makes it far too easy for the person who's NOT on the black.

Taken from.... http://www.arseweb.com/pool/uk_rules.HTML