Julie Pfaff Majercak sent Greg some blonde jokes: 

7 Degrees of Being a Blonde

Flowers

Flasher

Puzzle

Overeducated Blonde

Dead BMW

Speeding Ticket

Riverwalk

Knitting

Blonde on the Sun

In a Vacuum

Final Exam

THE BLONDE JOKE TO END ALL BLONDE JOKES

Blondes in Cars

Julie 's favorite

Here are some others:

Andy's Blonde Joke

Gail's Blonde Joke

Julie's Blonde Joke

Katies Blonde Joke- Exposure

Gregs favorite blonde joke is about the 3 blondes on the beach.  Next time you see him you'll have to ask......