Bought the original game a while back and this is the second expansion pack I've purchased. The game has been borrowed by friends too, such is its popularity.
A broad mind is required-- this is not a game for the prudish. It is best played on return from the pub when everything seems even more hilarious. Some of the cards refer to things in US culture but this isn't a problem as blank cards are included so you can write your own.
This is the only game I've ever played when I have laughed so hard a bit of wee has come out!