Complex sentence: There is a poetic side to Jeeves; in addition to reciting a great deal of poetry, he is much affected when a parted couple reconciles, and he tells Bertie that his heart leaps up when he beholds a rainbow in the sky.
Split into simpler sentences: There is a poetic side to Jeeves, who recites a great deal of poetry. He is much affected when a parted couple reconciles, and tells Bertie that his heart leaps up when he beholds a rainbow in the sky.