Based on Dave Barry's book, the Complete guide to guys follows guyness from prehistoroc times, to current times and explains many of the mysteries we wonder. Like why do guys leave the toilet seat up, and why won't they ask for directions?

When Josh and Amanda make eye contact at the airport, they both experience an instant attraction, and soon they're living together. But one day Josh awakens from his romantic haze to find his new life partner hospitalized for bipolar disorder.