P.G. Wodehouse's quote humorously reflects on the nature of marriage and commitment. It suggests that a man who is forgetful enough to misremember the anniversary of his first year of marriage is likely to lose sight of his marital status as time progresses. This sentiment highlights how easily mundane aspects of life can fade from memory, particularly in the fast pace of everyday living.
The author employs wit to convey a deeper truth about relationships and human nature—how familiarity can breed forgetfulness. As time goes on, daily routines may overshadow the significance of special moments, making it crucial to cherish and remember the commitments we uphold.