Success Happy

What does the saying 'sit on a happy face' mean- I got some funny looks?

Its on my t-shirt with a smiley yellow face with its tongue saying sit on a happy face and I got some funny looks in college today =/ help?

Public Comments

1. It's a sexual reference.-, something in line with Free Mustache Rides. I'd give the tee to someone who doesn't get embarrassed easily.