Just been looking online myself and had a good chuckle at this site:
Silly Jokes
These 2 pages on the same site are worth a visit if you don't have time for a browse:
Tartan Paint
Long Weight
These 2 are perfect for email gags!:rotfl:
And if you get fooled, here's a couple of email replies:
Smart Reply 1
Smart Reply 2
One of my favourite gags is for the person who LOVES their car. Simply wet some white or grey cotton sewing thread and lay along the paintwork in a prominent position - it really looks like a very deep scratch!!!
I've got many people with this one! lol :rotfl: