My mom was a photographer and whenever they needed a baby for a modelling job, she'd stick me in front of the camera. That's how it started.
Humor is richly rewarding to the person who employs it. It has some value in gaining and holding attention, but it has no persuasive value at all.
I designed all the characters, anyway, and Frank Doyle was doing all the writing. I didn't have any more input on what direction they were going to go with Josie.