I'm the creator of the popular internet phenomenon 'WTFSexFacts', which is a successful blog, Twitter account and YouTube channel.
All of my slogan ideas come from my Twitter account where I regularly come up with one-liners that are ReTweeted 100s of times and I have made Top Tweets on more than one occasion. I plan to bring the most popular of these to this Threadless account and have them turned into T-Shirts.
I have already had T-shirts made by other companies, though these ideas were somewhat controversial ones. I also have previous experience writing jokes for greetings cards companies. I also used to come up with slogans for pictures in newspapers and magazines.