Though biographers continue to debate Whitman's sexuality, he is usually described as either homosexual or bisexual in his feelings and attractions. Whitman's sexual orientation is generally assumed on the basis of his poetry, though this assumption has been disputed. His poetry depicts love and sexuality in a more earthy, individualistic way common in American culture before the medicalization of sexuality in the late 19th century. Though "Leaves of Grass" was often labeled pornographic or obscene, only one critic remarked on its author's presumed sexual activity: in a November 1855 review, Rufus Wilmot Griswold suggested Whitman was guilty of "that horrible sin not to be mentioned among Christians".