i've categorized the jokes so as not to offend anybody. the ratings are as follows (the ratings themselves have been plagiarized from the much-respected US movie ratings!!!):

Currently there are four jokes sets....
Jokes Set 1: UA
Jokes Set 2: OF
Jokes Set 3: OS
Jokes Set 4: UA

(PG - Parental Guidance required
EL - Explicit Language
OF - May be offensive to females
OS - Offensive to Some people
UA - Universal)