Until it was confronted by the cruel realities of its time and place, the relationship between Jack and Ennis in "Brokeback Mountain" existed in a kind of utopian innocence, isolated and undefined. And being isolated, both topographically and culturally, from the contamination of bigotry and gay culture (which has oppressive features of its own) alike, their love was unnamed and therefore free, not only to speak, but to say nothing. Tom Ford’s striking screen rendition of Christopher Isherwood’s “A Single Man” has the same air of reticence, suspension, of a world apart. But although both stories take place in roughly the same time frame, they’re vastly different in context, culture, and mood. Insulated from the crudities of overt bigotry by the diffidence of an upscale milieu instead of by the natural fortress of a mountain range, and from the pressures of an as yet marginal gay culture, George Falconer’s grief is as free to play out on terms common to the human condition as ...