“I’d introduce myself, but I don’t know me either.” — Jerry Lewis, The Patsy (1964) Jerry Lewis is 90 years old. He’s spent, at least by his own count, 85 of those years entertaining audiences in one form or another—debuting on stage at age five, miming along with records in hotel shows as a kid, emceeing for acts on the Borscht Belt as a teenager. Lewis signed the contract to make his first picture, My Friend Irma, with Dean Martin, 68 years ago. He met Dean at least three years before that. Their fifth collaboration, Sailor Beware (1952), was seen by more than 80 million people worldwide. He wrote, produced, directed, and starred in 13 of his own films from 1960-1983. The first, The Bellboy (1960), Lewis shot and edited…