I really like this little box of every dirty word you could think of.  My wife and I work opposite shifts and we leave dirty little messages for each other on the fridge.  I would recommend adding another box or two just to increase the amount of words you have to work with.  This box comes with probably 100 words but most of them we don't use.  I find myself wanting more words like "your" as there is only 1 in the box.  Otherwise it is great.